blender-archive/source/blender/src/transform_manipulator.c

/**
* $Id:
 *
 * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2005 Blender Foundation
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

#include <stdlib.h>
#include <string.h>
#include <math.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifndef WIN32
#include <unistd.h>
#else
#include <io.h>
#endif

#include "MEM_guardedalloc.h"

#include "DNA_armature_types.h"
#include "DNA_curve_types.h"
#include "DNA_lattice_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meta_types.h"
#include "DNA_object_types.h"
#include "DNA_screen_types.h"
#include "DNA_scene_types.h"
#include "DNA_space_types.h"
#include "DNA_userdef_types.h"
#include "DNA_view3d_types.h"

#include "BKE_armature.h"
#include "BKE_global.h"
#include "BKE_lattice.h"
#include "BKE_object.h"
#include "BKE_utildefines.h"

#include "BLI_arithb.h"
#include "BLI_editVert.h"

#include "BIF_editarmature.h"
#include "BIF_gl.h"
#include "BIF_mywindow.h"
#include "BIF_resources.h"
#include "BIF_screen.h"
#include "BIF_space.h"
#include "BIF_transform.h"

#include "BSE_edit.h"
#include "BSE_view.h"
#include "BDR_drawobject.h"

#include "blendef.h"
#include "transform.h"
#include "transform_generics.h"

/* return codes for select, and drawing flags */

#define MAN_TRANS_X		1
#define MAN_TRANS_Y		2
#define MAN_TRANS_Z		4
#define MAN_TRANS_C		7

#define MAN_ROT_X		8
#define MAN_ROT_Y		16
#define MAN_ROT_Z		32
#define MAN_ROT_V		64
#define MAN_ROT_T		128
#define MAN_ROT_C		248

#define MAN_SCALE_X		256
#define MAN_SCALE_Y		512
#define MAN_SCALE_Z		1024
#define MAN_SCALE_C		1792

/* color codes */

#define MAN_RGB		0
#define MAN_GREY	1
#define MAN_MOVECOL	2

/* GLOBAL VARIABLE THAT SHOULD MOVED TO SCREEN MEMBER OR SOMETHING  */
extern TransInfo Trans;


static int is_mat4_flipped(float mat[][4])
{
	float vec[3];
	
	Crossf(vec, mat[0], mat[1]);
	if( Inpf(vec, mat[2]) < 0.0 ) return 1;
	return 0;
}	

/* transform widget center calc helper for below */
static void calc_tw_center(float *co)
{
	float *twcent= G.scene->twcent;
	float *min= G.scene->twmin;
	float *max= G.scene->twmax;
	
	DO_MINMAX(co, min, max);
	VecAddf(twcent, twcent, co);
}

/* callback */
static void stats_pose(ListBase *lb, float *normal, float *plane)
{
	Bone *bone;
	float vec[3], mat[4][4];
	
	for(bone= lb->first; bone; bone= bone->next) {
		if (bone->flag & BONE_SELECTED) {
			/* We don't let IK children get "grabbed" */
			/* ALERT! abusive global Trans here */
			if ( (Trans.mode!=TFM_TRANSLATION) || (bone->flag & BONE_IK_TOPARENT)==0 ) {
				
				get_bone_root_pos (bone, vec, 1);
				
				calc_tw_center(vec);
				where_is_bone(G.obpose, bone);
				get_objectspace_bone_matrix(bone, mat, 1, 1);	// points in negative Y o_O
					
				VecAddf(normal, normal, mat[2]);
				VecAddf(plane, plane, mat[1]);
				
				return;	// see above function
			}
		}
		stats_pose(&bone->childbase, normal, plane);
	}
}


/* centroid, boundbox, of selection */
/* returns total items selected */
static int calc_manipulator(ScrArea *sa)
{
	extern ListBase editNurb;
	View3D *v3d= sa->spacedata.first;
	Base *base;
	Object *ob=NULL;
	float normal[3]={0.0, 0.0, 0.0};
	float plane[3]={0.0, 0.0, 0.0};
	int a, totsel=0;
	
	/* transform widget matrix */
	Mat4One(v3d->twmat);
	
	/* transform widget centroid/center */
	G.scene->twcent[0]= G.scene->twcent[1]= G.scene->twcent[2]= 0.0f;
	INIT_MINMAX(G.scene->twmin, G.scene->twmax);
	
	if(G.obedit) {
		ob= G.obedit;
		
		if(G.obedit->type==OB_MESH) {
			EditMesh *em = G.editMesh;
			EditVert *eve;
			
			for(eve= em->verts.first; eve; eve= eve->next) {
				if(eve->f & SELECT) {
					totsel++;
					calc_tw_center(eve->co);
				}
			}
			if(v3d->twmode == V3D_MANIP_NORMAL) {
				EditFace *efa;
				float vec[3];
				for(efa= em->faces.first; efa; efa= efa->next) {
					if(efa->f & SELECT) {
						VecAddf(normal, normal, efa->n);
						VecSubf(vec, efa->v2->co, efa->v1->co);
						VecAddf(plane, plane, vec);
					}
				}
			}
		}
		else if (G.obedit->type==OB_ARMATURE){
			EditBone *ebo;
			for (ebo=G.edbo.first;ebo;ebo=ebo->next){
				
				//	If this is an IK child and it's parent is being moved, don't count as selected
				if ((ebo->flag & BONE_IK_TOPARENT)&& (ebo->flag & BONE_ROOTSEL) && ebo->parent && (ebo->parent->flag & BONE_TIPSEL));
				else {
					if (ebo->flag & BONE_TIPSEL) {
						calc_tw_center(ebo->tail);
						totsel++;
					}
					if (ebo->flag & BONE_ROOTSEL) {
						calc_tw_center(ebo->head);
						totsel++;
					}
				}
			}
		}
		else if ELEM3(G.obedit->type, OB_CURVE, OB_SURF, OB_FONT) {
			Nurb *nu;
			BezTriple *bezt;
			BPoint *bp;
			
			nu= editNurb.first;
			while(nu) {
				if((nu->type & 7)==CU_BEZIER) {
					bezt= nu->bezt;
					a= nu->pntsu;
					while(a--) {
						if(bezt->f1) {
							calc_tw_center(bezt->vec[0]);
							totsel++;
						}
						if(bezt->f2) {
							calc_tw_center(bezt->vec[1]);
							totsel++;
						}
						if(bezt->f3) {
							calc_tw_center(bezt->vec[2]);
							totsel++;
						}
						bezt++;
					}
				}
				else {
					bp= nu->bp;
					a= nu->pntsu*nu->pntsv;
					while(a--) {
						if(bp->f1 & 1) {
							calc_tw_center(bp->vec);
							totsel++;
						}
						bp++;
					}
				}
				nu= nu->next;
			}
		}
		else if(G.obedit->type==OB_MBALL) {
			/* editmball.c */
			extern ListBase editelems;  /* go away ! */
			MetaElem *ml;
		
			ml= editelems.first;
			while(ml) {
				if(ml->flag & SELECT) {
					calc_tw_center(&ml->x);
					totsel++;
				}
				ml= ml->next;
			}
		}
		else if(G.obedit->type==OB_LATTICE) {
			BPoint *bp;
			bp= editLatt->def;
			
			a= editLatt->pntsu*editLatt->pntsv*editLatt->pntsw;
			while(a--) {
				if(bp->f1 & 1) {
					calc_tw_center(bp->vec);
					totsel++;
				}
				bp++;
			}
		}
		
		/* selection center */
		if(totsel) {
			VecMulf(G.scene->twcent, 1.0f/(float)totsel);	// centroid!
			Mat4MulVecfl(G.obedit->obmat, G.scene->twcent);
			Mat4MulVecfl(G.obedit->obmat, G.scene->twmin);
			Mat4MulVecfl(G.obedit->obmat, G.scene->twmax);
		}
	}
	else if(G.obpose) {
		bArmature *arm= G.obpose->data;
		
		ob= G.obpose;
		Trans.mode= TFM_ROTATION;	// mislead counting bones... bah
		
		/* count total */
		count_bone_select(&arm->bonebase, &totsel);
		if(totsel) {
			/* recursive get stats */
			stats_pose(&arm->bonebase, normal, plane);
			
			//VecMulf(normal, -1.0);
			VecMulf(plane, -1.0);
			
			VecMulf(G.scene->twcent, 1.0f/(float)totsel);	// centroid!
			Mat4MulVecfl(G.obpose->obmat, G.scene->twcent);
			Mat4MulVecfl(G.obpose->obmat, G.scene->twmin);
			Mat4MulVecfl(G.obpose->obmat, G.scene->twmax);
		}
	}
	else if(G.f & (G_FACESELECT + G_VERTEXPAINT + G_TEXTUREPAINT +G_WEIGHTPAINT)) {
		;
	}
	else {
		
		/* we need the one selected object, if its not active */
		ob= OBACT;
		if(ob && !(ob->flag & SELECT)) ob= NULL;
		
		base= (G.scene->base.first);
		while(base) {
			if(v3d->lay & base->lay) {
				
				if(base->flag & SELECT) {
					if(ob==NULL) ob= base->object;
					calc_tw_center(base->object->obmat[3]);
					totsel++;
				}
			}
			base= base->next;
		}
		
		/* selection center */
		if(totsel) {
			VecMulf(G.scene->twcent, 1.0f/(float)totsel);	// centroid!
		}
	}
	
	/* global, local or normal orientation? */
	if(ob && totsel) {
		
		switch(v3d->twmode) {
		case V3D_MANIP_GLOBAL:
			break;
			
		case V3D_MANIP_NORMAL:
			if(G.obedit || G.obpose) {
				if(normal[0]!=0.0 || normal[1]!=0.0 || normal[2]!=0.0) {
					float mat[3][3];
					
					Normalise(normal);
					Normalise(plane);
					VECCOPY(mat[2], normal);
					Crossf(mat[0], normal, plane);
					Crossf(mat[1], mat[2], mat[0]);
					
					Mat4MulMat43(v3d->twmat, ob->obmat, mat);
					Mat4Ortho(v3d->twmat);
					
					break;
				}
			}
			/* no break we define 'normal' as 'local' in Object mode */
		case V3D_MANIP_LOCAL:
			if(totsel==1 || v3d->around==V3D_LOCAL || G.obedit || G.obpose) {
				Mat4CpyMat4(v3d->twmat, ob->obmat);
				Mat4Ortho(v3d->twmat);
			}
			break;
		}		
	}
	   
	return totsel;
}

/* ******************** DRAWING STUFFIES *********** */

/* radring = radius of donut rings
   radhole = radius hole
   start = starting segment (based on nrings)
   end   = end segment
   nsides = amount of points in ring
   nrigns = amount of rings
*/
static void partial_donut(float radring, float radhole, int start, int end, int nsides, int nrings)
{
	float theta, phi, theta1;
	float cos_theta, sin_theta;
	float cos_theta1, sin_theta1;
	float ring_delta, side_delta;
	int i, j;
	
	ring_delta= 2.0*M_PI/(float)nrings;
	side_delta= 2.0*M_PI/(float)nsides;
	
	theta= M_PI+0.5*ring_delta;
	cos_theta= cos(theta);
	sin_theta= sin(theta);
	
	for(i= nrings - 1; i >= 0; i--) {
		theta1= theta + ring_delta;
		cos_theta1= cos(theta1);
		sin_theta1= sin(theta1);
		
		if(i==start) {	// cap
			glBegin(GL_POLYGON);
			glNormal3f(-sin_theta1, -cos_theta1, 0.0);
			phi= 0.0;
			for(j= nsides; j >= 0; j--) {
				float cos_phi, sin_phi, dist;
				
				phi += side_delta;
				cos_phi= cos(phi);
				sin_phi= sin(phi);
				dist= radhole + radring * cos_phi;
				
				glVertex3f(cos_theta1 * dist, -sin_theta1 * dist,  radring * sin_phi);
			}
			glEnd();
		}
		if(i>=start && i<=end) {
			glBegin(GL_QUAD_STRIP);
			phi= 0.0;
			for(j= nsides; j >= 0; j--) {
				float cos_phi, sin_phi, dist;
				
				phi += side_delta;
				cos_phi= cos(phi);
				sin_phi= sin(phi);
				dist= radhole + radring * cos_phi;
				
				glNormal3f(cos_theta1 * cos_phi, -sin_theta1 * cos_phi, sin_phi);
				glVertex3f(cos_theta1 * dist, -sin_theta1 * dist, radring * sin_phi);
				glNormal3f(cos_theta * cos_phi, -sin_theta * cos_phi, sin_phi);
				glVertex3f(cos_theta * dist, -sin_theta * dist,  radring * sin_phi);
			}
			glEnd();
		}
		
		if(i==end) {	// cap
			glBegin(GL_POLYGON);
			glNormal3f(sin_theta, cos_theta, 0.0);
			phi= 0.0;
			for(j= nsides; j >= 0; j--) {
				float cos_phi, sin_phi, dist;
				
				phi -= side_delta;
				cos_phi= cos(phi);
				sin_phi= sin(phi);
				dist= radhole + radring * cos_phi;
				
				glVertex3f(cos_theta * dist, -sin_theta * dist,  radring * sin_phi);
			}
			glEnd();
		}
		
		
		theta= theta1;
		cos_theta= cos_theta1;
		sin_theta= sin_theta1;
	}
}

/* three colors can be set;
   grey for ghosting
   moving: in transform theme color
   else the red/green/blue
*/
static void manipulator_setcolor(char axis, int colcode)
{
	float vec[4];
	
	vec[3]= 0.7; // alpha set on 0.5, can be glEnabled or not
	
	if(colcode==MAN_GREY) {
		if(axis > 'Z') glColor4ub(0, 0, 0, 70);
		else {
			vec[0]= vec[1]= vec[2]= 1.0; vec[3]= 0.3;
			glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, vec);
		}
	}
	else if(colcode==MAN_MOVECOL) {
		if(axis > 'Z') BIF_ThemeColor(TH_TRANSFORM);
		else {
			BIF_GetThemeColor3fv(TH_TRANSFORM, vec);
			glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, vec);
		}
	}
	else {
		switch(axis) {
		case 'x':
			glColor3ub(255, 0, 100);
			break;
		case 'y':
			glColor3ub(100, 255, 100);
			break;
		case 'z':
			glColor3ub(50, 50, 225);
			break;
		case 'X':
			vec[2]= vec[1]= 0.0; vec[0]= 1.0;
			glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, vec);
			break;
		case 'Y':
			vec[0]= vec[2]= 0.0; vec[1]= 1.0;
			glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, vec);
			break;
		case 'Z':
			vec[0]= vec[1]= 0.0; vec[2]= 1.0;
			glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, vec);
			break;
		case 'C':
			BIF_GetThemeColor3fv(TH_TRANSFORM, vec);
			if(G.vd->twmode == V3D_MANIP_LOCAL) {vec[0]+= 0.25; vec[1]+=0.25; vec[2]+=0.25;}
			else if(G.vd->twmode == V3D_MANIP_NORMAL) {vec[0]-= 0.2; vec[1]-=0.2; vec[2]-=0.2;}
			glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, vec);
			break;
		}
	}
}

/* viewmatrix should have been set OK, also no shademode! */
static void draw_manipulator_axes(int colcode, int flagx, int flagy, int flagz)
{
	
	/* axes */
	if(flagx) {
		manipulator_setcolor('x', colcode);
		glBegin(GL_LINES);
		glVertex3f(0.0, 0.0, 0.0);
		glVertex3f(1.0, 0.0, 0.0);
		glEnd();
	}		
	if(flagy) {
		manipulator_setcolor('y', colcode);
		glBegin(GL_LINES);
		glVertex3f(0.0, 0.0, 0.0);
		glVertex3f(0.0, 1.0, 0.0);
		glEnd();
	}		
	if(flagz) {
		manipulator_setcolor('z', colcode);
		glBegin(GL_LINES);
		glVertex3f(0.0, 0.0, 0.0);
		glVertex3f(0.0, 0.0, 1.0);
		glEnd();
	}
}

/* only called while G.moving */
static void draw_manipulator_rotate_ghost(float mat[][4], int drawflags)
{
	GLUquadricObj *qobj= gluNewQuadric(); 
	float size, phi, vec[3], matt[4][4], cross[3];
	
	glDisable(GL_DEPTH_TEST);
	gluQuadricDrawStyle(qobj, GLU_FILL); 
	
	glColor4ub(0,0,0,64);
	glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_BLEND);
		
	/* we need both [4][4] transforms, Trans.mat seems to be premul, not post for mat[][4] */
	Mat4CpyMat4(matt, mat); // to copy the parts outside of [3][3]
	Mat4MulMat34(matt, Trans.mat, mat);

	/* Screen aligned view rot circle */
	if(drawflags & MAN_ROT_V) {
		float startphi;
		
		/* prepare for screen aligned draw */
		VECCOPY(vec, mat[0]);
		size= Normalise(vec);
		glPushMatrix();
		glTranslatef(mat[3][0], mat[3][1], mat[3][2]);
		
		/* sets view screen aligned */
		glRotatef( -360.0*saacos(G.vd->viewquat[0])/M_PI, G.vd->viewquat[1], G.vd->viewquat[2], G.vd->viewquat[3]);
	
		vec[0]= Trans.imval[0] - Trans.center2d[0];
		vec[1]= Trans.imval[1] - Trans.center2d[1];
		vec[2]= 0.0;
		Normalise(vec);
		
		startphi= saacos( vec[1] );
		if(vec[0]<0.0) startphi= -startphi;
		
		phi= fmod(-180.0*Trans.val/M_PI, 360.0);
		if(phi > 180.0) phi-= 360.0;
		else if(phi<-180.0) phi+= 360.0;
		
		gluPartialDisk(qobj, 0.0, size, 32, 1, 180.0*startphi/M_PI, phi);
		
		glPopMatrix();
	}
	
	
	mymultmatrix(mat);	// aligns with original widget
	
	/* Z disk */
	if(drawflags & MAN_ROT_Z) {
		VECCOPY(vec, mat[0]);	// use x axis to detect rotation
		Normalise(vec);
		Normalise(matt[0]);
		phi= saacos( Inpf(vec, matt[0]) );
		if(phi!=0.0) {
			Crossf(cross, vec, matt[0]);	// results in z vector
			if(Inpf(cross, mat[2]) > 0.0) phi= -phi;
			gluPartialDisk(qobj, 0.0, 1.0, 32, 1, 90.0, 180.0*phi/M_PI);
		}
	}
	/* X disk */
	if(drawflags & MAN_ROT_X) {
		VECCOPY(vec, mat[1]);	// use y axis to detect rotation
		Normalise(vec);
		Normalise(matt[1]);
		phi= saacos( Inpf(vec, matt[1]) );
		if(phi!=0.0) {
			Crossf(cross, vec, matt[1]);	// results in x vector
			if(Inpf(cross, mat[0]) > 0.0) phi= -phi;
			glRotatef(90.0, 0.0, 1.0, 0.0);
			gluPartialDisk(qobj, 0.0, 1.0, 32, 1, 0.0, 180.0*phi/M_PI);
			glRotatef(-90.0, 0.0, 1.0, 0.0);
		}
	}	
	/* Y circle */
	if(drawflags & MAN_ROT_Y) {
		VECCOPY(vec, mat[2]);	// use z axis to detect rotation
		Normalise(vec);
		Normalise(matt[2]);
		phi= saacos( Inpf(vec, matt[2]) );
		if(phi!=0.0) {
			Crossf(cross, vec, matt[2]);	// results in y vector
			if(Inpf(cross, mat[1]) > 0.0) phi= -phi;
			glRotatef(-90.0, 1.0, 0.0, 0.0);
			gluPartialDisk(qobj, 0.0, 1.0, 32, 1, 180.0, 180.0*phi/M_PI);
			glRotatef(90.0, 1.0, 0.0, 0.0);
		}
	}
	
	glDisable(GL_BLEND);
	myloadmatrix(G.vd->viewmat);
}

static void draw_manipulator_rotate(float mat[][4], int moving, int drawflags, int combo)
{
	GLUquadricObj *qobj= gluNewQuadric(); 
	double plane[4];
	float size, vec[3], unitmat[4][4];
	float cywid= 0.33f*0.01f*(float)U.tw_handlesize;	
	float cusize= cywid*0.65;
	int arcs= (G.rt==2);
	int colcode;
	
	if(moving) colcode= MAN_MOVECOL;
	else colcode= MAN_RGB;
	
	if(G.rt==3) cusize= cywid*0.3;
	
	/* when called while moving in mixed mode, do not draw when... */
	if((drawflags & MAN_ROT_C)==0) return;
	
	/* Init stuff */
	glDisable(GL_DEPTH_TEST);
	Mat4One(unitmat);
	gluQuadricDrawStyle(qobj, GLU_FILL); 
	gluQuadricNormals(qobj, GLU_SMOOTH);
	glEnable(GL_CULL_FACE);		// backface removal
	glShadeModel(GL_SMOOTH);
	
	
	/* prepare for screen aligned draw */
	VECCOPY(vec, mat[0]);
	size= Normalise(vec);
	glPushMatrix();
	glTranslatef(mat[3][0], mat[3][1], mat[3][2]);
	
	if(arcs) {
		/* clipplane makes nice handles, calc here because of multmatrix but with translate! */
		VECCOPY(plane, G.vd->viewinv[2]);
		plane[3]= -0.1; // clip more
		glClipPlane(GL_CLIP_PLANE0, plane);
	}
	/* sets view screen aligned */
	glRotatef( -360.0*saacos(G.vd->viewquat[0])/M_PI, G.vd->viewquat[1], G.vd->viewquat[2], G.vd->viewquat[3]);
	
	/* Screen aligned help circle */
	if(arcs) {
		if((G.f & G_PICKSEL)==0) {
			BIF_ThemeColorShade(TH_BACK, -30);
			drawcircball(unitmat[3], size, unitmat);
		}
	}
	/* Screen aligned view rot circle */
	if(drawflags & MAN_ROT_V) {
		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_V);
		BIF_ThemeColor(TH_TRANSFORM);
		drawcircball(unitmat[3], 1.2*size, unitmat);
		
		if(moving) {	
			float vec[3];
			vec[0]= Trans.imval[0] - Trans.center2d[0];
			vec[1]= Trans.imval[1] - Trans.center2d[1];
			vec[2]= 0.0;
			Normalise(vec);
			VecMulf(vec, 1.2*size);
			glBegin(GL_LINES);
			glVertex3f(0.0, 0.0, 0.0);
			glVertex3fv(vec);
			glEnd();
		}
	}
	glPopMatrix();
	
	/* apply the transform delta */
	if(moving) {
		float matt[4][4];
		Mat4CpyMat4(matt, mat); // to copy the parts outside of [3][3]
		Mat4MulMat34(matt, Trans.mat, mat);
		mymultmatrix(matt);
		glFrontFace( is_mat4_flipped(matt)?GL_CW:GL_CCW);
	}
	else {
		glFrontFace( is_mat4_flipped(mat)?GL_CW:GL_CCW);
		mymultmatrix(mat);
	}
	
	/* axes */
	if(arcs==0) {
		if(!(G.f & G_PICKSEL)) {
			if( (combo & V3D_MANIP_SCALE)==0) {
				/* axis */
				glBegin(GL_LINES);
				if( (drawflags & MAN_ROT_X) || (moving && (drawflags & MAN_ROT_Z)) ) {
					manipulator_setcolor('x', colcode);
					glVertex3f(0.0, 0.0, 0.0);
					glVertex3f(1.0, 0.0, 0.0);
				}		
				if( (drawflags & MAN_ROT_Y) || (moving && (drawflags & MAN_ROT_X)) ) {
					manipulator_setcolor('y', colcode);
					glVertex3f(0.0, 0.0, 0.0);
					glVertex3f(0.0, 1.0, 0.0);
				}		
				if( (drawflags & MAN_ROT_Z) || (moving && (drawflags & MAN_ROT_Y)) ) {
					manipulator_setcolor('z', colcode);
					glVertex3f(0.0, 0.0, 0.0);
					glVertex3f(0.0, 0.0, 1.0);
				}
				glEnd();
			}
		}
	}
	
	/* Trackball center */
	if((drawflags & MAN_ROT_T) && (combo & V3D_MANIP_TRANSLATE)==0) {
		float smat[3][3], imat[3][3];
		float offset[3];
		
		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_T);
		
		Mat3CpyMat4(smat, mat);
		Mat3Inv(imat, smat);

		getViewVector(mat[3], offset);
		Mat3MulVecfl(imat, offset);
		Normalise(offset);	// matrix space is such that 1.0 = size of sphere
		
		if(moving) {
			BIF_ThemeColor(TH_TRANSFORM);
			glBegin(GL_LINES);
			glVertex3f(0.0, 0.0, 0.0);
			glVertex3fv(offset);
			glEnd();
		}
		
		glEnable(GL_LIGHTING);
		
		VECCOPY(vec, offset);
		glTranslatef(vec[0], vec[1], vec[2]);
		manipulator_setcolor('C', colcode);
		gluSphere(qobj, cywid, 8, 6);
		
		/* restore */
		glTranslatef(-vec[0], -vec[1], -vec[2]);
		glDisable(GL_LIGHTING);
	}
	
	if(arcs==0 && moving) {
		
		if(arcs) glEnable(GL_CLIP_PLANE0);

		/* Z circle */
		if(drawflags & MAN_ROT_Z) {
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Z);
			manipulator_setcolor('z', colcode);
			drawcircball(unitmat[3], 1.0, unitmat);
		}
		/* X circle */
		if(drawflags & MAN_ROT_X) {
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_X);
			glRotatef(90.0, 0.0, 1.0, 0.0);
			manipulator_setcolor('x', colcode);
			drawcircball(unitmat[3], 1.0, unitmat);
			glRotatef(-90.0, 0.0, 1.0, 0.0);
		}	
		/* Y circle */
		if(drawflags & MAN_ROT_Y) {
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Y);
			glRotatef(-90.0, 1.0, 0.0, 0.0);
			manipulator_setcolor('y', colcode);
			drawcircball(unitmat[3], 1.0, unitmat);
			glRotatef(90.0, 1.0, 0.0, 0.0);
		}
		
		if(arcs) glDisable(GL_CLIP_PLANE0);
	}
	// donut arcs
	if(arcs) {
		glEnable(GL_LIGHTING);
		glEnable(GL_CLIP_PLANE0);
		
		/* Z circle */
		if(drawflags & MAN_ROT_Z) {
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Z);
			manipulator_setcolor('Z', colcode);
			partial_donut(cusize/3.0, 1.0, 0, 48, 8, 48);
		}
		/* X circle */
		if(drawflags & MAN_ROT_X) {
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_X);
			glRotatef(90.0, 0.0, 1.0, 0.0);
			manipulator_setcolor('X', colcode);
			partial_donut(cusize/3.0, 1.0, 0, 48, 8, 48);
			glRotatef(-90.0, 0.0, 1.0, 0.0);
		}	
		/* Y circle */
		if(drawflags & MAN_ROT_Y) {
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Y);
			glRotatef(-90.0, 1.0, 0.0, 0.0);
			manipulator_setcolor('Y', colcode);
			partial_donut(cusize/3.0, 1.0, 0, 48, 8, 48);
			glRotatef(90.0, 1.0, 0.0, 0.0);
		}
		
		glDisable(GL_CLIP_PLANE0);
	}
	
	if(arcs==0) {
		glEnable(GL_LIGHTING);
		
		/* Z handle on X axis */
		if(drawflags & MAN_ROT_Z) {
			glPushMatrix();
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Z);
			manipulator_setcolor('Z', colcode);

			if(G.rt==3) {
				partial_donut(cusize, 1.0, 21, 27, 8, 48);

				/* Z handle on Y axis */
				glRotatef(90.0, 0.0, 0.0, 1.0);
				partial_donut(cusize, 1.0, 21, 27, 8, 48);
			}
			else {
				partial_donut(cusize, 1.0, 23, 25, 8, 48);
			}
			glPopMatrix();
		}	

		/* Y handle on X axis */
		if(drawflags & MAN_ROT_Y) {
			glPushMatrix();
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Y);
			manipulator_setcolor('Y', colcode);
			
			if(G.rt==3) {
				glRotatef(90.0, 1.0, 0.0, 0.0);
				partial_donut(cusize, 1.0, 21, 27, 8, 48);
				
				/* Y handle on Z axis */
				glRotatef(90.0, 0.0, 0.0, 1.0);
				partial_donut(cusize, 1.0, 21, 27, 8, 48);
			}
			else {
				glRotatef(90.0, 1.0, 0.0, 0.0);
				glRotatef(90.0, 0.0, 0.0, 1.0);
				partial_donut(cusize, 1.0, 23, 25, 8, 48);
			}
			
			glPopMatrix();
		}
		
		/* X handle on Z axis */
		if(drawflags & MAN_ROT_X) {
			glPushMatrix();
			if(G.f & G_PICKSEL) glLoadName(MAN_ROT_X);
			manipulator_setcolor('X', colcode);
			
			if(G.rt==3) {
				glRotatef(-90.0, 0.0, 1.0, 0.0);
				partial_donut(cusize, 1.0, 21, 27, 8, 48);
				
				/* X handle on Y axis */
				glRotatef(90.0, 0.0, 0.0, 1.0);
				partial_donut(cusize, 1.0, 21, 27, 8, 48);
			}
			else {
				glRotatef(-90.0, 0.0, 1.0, 0.0);
				glRotatef(90.0, 0.0, 0.0, 1.0);
				partial_donut(cusize, 1.0, 23, 25, 8, 48);
			}
			glPopMatrix();
		}
		
	}
	
	/* restore */
	myloadmatrix(G.vd->viewmat);
	glDisable(GL_CULL_FACE);
	glDisable(GL_LIGHTING);
	glFrontFace(GL_CCW);
	gluDeleteQuadric(qobj);
	if(G.zbuf) glEnable(GL_DEPTH_TEST);		// shouldn't be global, tsk!
	
}

static void draw_manipulator_scale(float mat[][4], int moving, int drawflags, int combo, int colcode)
{
	float cywid= 0.33f*0.01f*(float)U.tw_handlesize;	
	float cusize= cywid*0.75, dz;
	
	/* when called while moving in mixed mode, do not draw when... */
	if((drawflags & MAN_SCALE_C)==0) return;
	
	if(moving) {
		float matt[4][4];
		
		Mat4CpyMat4(matt, mat); // to copy the parts outside of [3][3]
		Mat4MulMat34(matt, Trans.mat, mat);
		mymultmatrix(matt);
		glFrontFace( is_mat4_flipped(matt)?GL_CW:GL_CCW);
	}
	else {
		mymultmatrix(mat);
		glFrontFace( is_mat4_flipped(mat)?GL_CW:GL_CCW);
	}
	
	/* axis */
	if( (G.f & G_PICKSEL)==0 ) {
		
		glDisable(GL_DEPTH_TEST);
		
		/* in combo mode, this is always drawn as first type */
		draw_manipulator_axes(colcode, drawflags & MAN_SCALE_X, drawflags & MAN_SCALE_Y, drawflags & MAN_SCALE_Z);

		/* only has to be set when not in picking */
		glEnable(GL_CULL_FACE);		// backface removal
		glEnable(GL_LIGHTING);
		glShadeModel(GL_SMOOTH);
	}
	
	/* not in combo mode */
	if( (combo & (V3D_MANIP_TRANSLATE|V3D_MANIP_ROTATE))==0) {
		/* center cube, do not add to selection when shift is pressed (planar constraint)  */
		if( (G.f & G_PICKSEL) && (G.qual & LR_SHIFTKEY)==0) glLoadName(MAN_SCALE_C);
		
		manipulator_setcolor('C', colcode);
		drawsolidcube(cusize);
		
		dz= 1.0;
	}
	else dz= 1.0-3.0*cusize;
	
	/* Z cube */
	glTranslatef(0.0, 0.0, dz);
	if(drawflags & MAN_SCALE_Z) {
		if(G.f & G_PICKSEL) glLoadName(MAN_SCALE_Z);
		manipulator_setcolor('Z', colcode);
		drawsolidcube(cusize);
	}	
	/* X cube */
	glTranslatef(dz, 0.0, -dz);
	if(drawflags & MAN_SCALE_X) {
		if(G.f & G_PICKSEL) glLoadName(MAN_SCALE_X);
		manipulator_setcolor('X', colcode);
		drawsolidcube(cusize);
	}	
	/* Y cube */
	glTranslatef(-dz, dz, 0.0);
	if(drawflags & MAN_SCALE_Y) {
		if(G.f & G_PICKSEL) glLoadName(MAN_SCALE_Y);
		manipulator_setcolor('Y', colcode);
		drawsolidcube(cusize);
	}
	
	glDisable(GL_CULL_FACE);
	glDisable(GL_LIGHTING);
	
	/* if shiftkey, center point as last, for selectbuffer order */
	if(G.f & G_PICKSEL) {
		if(G.qual & LR_SHIFTKEY) {
			glTranslatef(0.0, -dz, 0.0);
			glLoadName(MAN_SCALE_C);
			glBegin(GL_POINTS);
			glVertex3f(0.0, 0.0, 0.0);
			glEnd();
		}
	}
	
	/* restore */
	myloadmatrix(G.vd->viewmat);
	
	if(G.zbuf) glEnable(GL_DEPTH_TEST);		// shouldn't be global, tsk!
	glFrontFace(GL_CCW);
}

static void draw_cone(GLUquadricObj *qobj, float len, float width)
{
	glTranslatef(0.0, 0.0, -0.5*len);
	gluCylinder(qobj, width, 0.0, len, 8, 1);
	gluQuadricOrientation(qobj, GLU_INSIDE);
	gluDisk(qobj, 0.0, width, 8, 1); 
	gluQuadricOrientation(qobj, GLU_OUTSIDE);
	glTranslatef(0.0, 0.0, 0.5*len);
}

static void draw_cylinder(GLUquadricObj *qobj, float len, float width)
{
	
	width*= 0.8;	// just for beauty
	
	glTranslatef(0.0, 0.0, -0.5*len);
	gluCylinder(qobj, width, width, len, 8, 1);
	gluQuadricOrientation(qobj, GLU_INSIDE);
	gluDisk(qobj, 0.0, width, 8, 1); 
	gluQuadricOrientation(qobj, GLU_OUTSIDE);
	glTranslatef(0.0, 0.0, len);
	gluDisk(qobj, 0.0, width, 8, 1); 
	glTranslatef(0.0, 0.0, -0.5*len);
}


static void draw_manipulator_translate(float mat[][4], int moving, int drawflags, int combo, int colcode)
{
	GLUquadricObj *qobj = gluNewQuadric(); 
	float cylen= 0.01f*(float)U.tw_handlesize;
	float cywid= 0.33f*cylen, dz;
	
	/* when called while moving in mixed mode, do not draw when... */
	if((drawflags & MAN_TRANS_C)==0) return;
	
	if(moving) glTranslatef(Trans.vec[0], Trans.vec[1], Trans.vec[2]);
	
	mymultmatrix(mat);

	glDisable(GL_DEPTH_TEST);
	
	/* axis */
	if( (G.f & G_PICKSEL)==0 ) {
		
		// translate drawn as last, only axis when no combo
		if(combo==V3D_MANIP_TRANSLATE)
			draw_manipulator_axes(colcode, drawflags & MAN_TRANS_X, drawflags & MAN_TRANS_Y, drawflags & MAN_TRANS_Z);
	
		/* only has to be set when not in picking */
		gluQuadricDrawStyle(qobj, GLU_FILL); 
		gluQuadricNormals(qobj, GLU_SMOOTH);
		glEnable(GL_CULL_FACE);		// backface removal
		glFrontFace( is_mat4_flipped(mat)?GL_CW:GL_CCW);
		glEnable(GL_LIGHTING);
		glShadeModel(GL_SMOOTH);
	}
	
	/* center sphere, do not add to selection when shift is pressed (planar constraint) */
	if( (G.f & G_PICKSEL) && (G.qual & LR_SHIFTKEY)==0) glLoadName(MAN_TRANS_C);
	
	manipulator_setcolor('C', colcode);
	gluSphere(qobj, cywid, 8, 6); 
	
	/* offset in combo mode */
	if(combo & (V3D_MANIP_ROTATE|V3D_MANIP_SCALE)) dz= 1.0+cylen;
	else dz= 1.0;
	
	/* Z Cone */
	glTranslatef(0.0, 0.0, dz);
	if(drawflags & MAN_TRANS_Z) {
		if(G.f & G_PICKSEL) glLoadName(MAN_TRANS_Z);
		manipulator_setcolor('Z', colcode);
		draw_cone(qobj, cylen, cywid);
	}	
	/* X Cone */
	glTranslatef(dz, 0.0, -dz);
	if(drawflags & MAN_TRANS_X) {
		if(G.f & G_PICKSEL) glLoadName(MAN_TRANS_X);
		glRotatef(90.0, 0.0, 1.0, 0.0);
		manipulator_setcolor('X', colcode);
		draw_cone(qobj, cylen, cywid);
		glRotatef(-90.0, 0.0, 1.0, 0.0);
	}	
	/* Y Cone */
	glTranslatef(-dz, dz, 0.0);
	if(drawflags & MAN_TRANS_Y) {
		if(G.f & G_PICKSEL) glLoadName(MAN_TRANS_Y);
		glRotatef(-90.0, 1.0, 0.0, 0.0);
		manipulator_setcolor('Y', colcode);
		draw_cone(qobj, cylen, cywid);
	}

	/* restore */
	glDisable(GL_CULL_FACE);
	glDisable(GL_LIGHTING);
		
	gluDeleteQuadric(qobj);
	myloadmatrix(G.vd->viewmat);
	glFrontFace(GL_CCW);
	
	if(G.zbuf) glEnable(GL_DEPTH_TEST);		// shouldn't be global, tsk!
	
}

static void draw_manipulator_rotate_cyl(float mat[][4], int moving, int drawflags, int combo, int colcode)
{
	GLUquadricObj *qobj = gluNewQuadric(); 
	float vec[3], size;
	float cylen= 0.01f*(float)U.tw_handlesize;
	float cywid= 0.33f*cylen;
	
	/* when called while moving in mixed mode, do not draw when... */
	if((drawflags & MAN_ROT_C)==0) return;
	
	/* prepare for screen aligned draw */
	VECCOPY(vec, mat[0]);
	size= Normalise(vec);
	glPushMatrix();
	glTranslatef(mat[3][0], mat[3][1], mat[3][2]);
	
	/* sets view screen aligned */
	glRotatef( -360.0*saacos(G.vd->viewquat[0])/M_PI, G.vd->viewquat[1], G.vd->viewquat[2], G.vd->viewquat[3]);
	
	/* Screen aligned view rot circle */
	if(drawflags & MAN_ROT_V) {
		float unitmat[4][4];
		Mat4One(unitmat);
		
		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_V);
		BIF_ThemeColor(TH_TRANSFORM);
		drawcircball(unitmat[3], 1.2*size, unitmat);
		
		if(moving) {
			float vec[3];
			vec[0]= Trans.imval[0] - Trans.center2d[0];
			vec[1]= Trans.imval[1] - Trans.center2d[1];
			vec[2]= 0.0;
			Normalise(vec);
			VecMulf(vec, 1.2*size);
			glBegin(GL_LINES);
			glVertex3f(0.0, 0.0, 0.0);
			glVertex3fv(vec);
			glEnd();
		}
	}
	glPopMatrix();
	
	/* apply the transform delta */
	if(moving) {
		float matt[4][4];
		Mat4CpyMat4(matt, mat); // to copy the parts outside of [3][3]
		Mat4MulMat34(matt, Trans.mat, mat);
		mymultmatrix(matt);
	}
	else {
		mymultmatrix(mat);
	}
	
	glFrontFace( is_mat4_flipped(mat)?GL_CW:GL_CCW);
	glDisable(GL_DEPTH_TEST);
	
	/* axis */
	if( (G.f & G_PICKSEL)==0 ) {
		
		// only draw axis when combo didn't draw scale axes
		if((combo & V3D_MANIP_SCALE)==0)
			draw_manipulator_axes(colcode, drawflags & MAN_ROT_X, drawflags & MAN_ROT_Y, drawflags & MAN_ROT_Z);
		
		/* only has to be set when not in picking */
		gluQuadricDrawStyle(qobj, GLU_FILL); 
		gluQuadricNormals(qobj, GLU_SMOOTH);
		glEnable(GL_CULL_FACE);		// backface removal
		glEnable(GL_LIGHTING);
		glShadeModel(GL_SMOOTH);
	}
	

	/* Trackball */
	if((drawflags & MAN_ROT_T) && (combo & V3D_MANIP_TRANSLATE)==0) {
		float smat[3][3], imat[3][3];
		float offset[3];
		
		Mat3CpyMat4(smat, mat);
		Mat3Inv(imat, smat);
		
		getViewVector(mat[3], offset);
		Mat3MulVecfl(imat, offset);
		Normalise(offset);	// matrix space is such that 1.0 = size of sphere
		
		if(moving) {
			glDisable(GL_LIGHTING);
			BIF_ThemeColor(TH_TRANSFORM);
			glBegin(GL_LINES);
			glVertex3f(0.0, 0.0, 0.0);
			glVertex3fv(offset);
			glEnd();
			glEnable(GL_LIGHTING);
		}
		
		/* center sphere, do not add to selection when shift is pressed (planar constraint) */
		if( (G.f & G_PICKSEL) && (G.qual & LR_SHIFTKEY)==0) glLoadName(MAN_ROT_T);
		
		VECCOPY(vec, offset);
		glTranslatef(vec[0], vec[1], vec[2]);
		manipulator_setcolor('C', colcode);
		gluSphere(qobj, cywid, 8, 6);
		
		/* restore */
		glTranslatef(-vec[0], -vec[1], -vec[2]);
	}
	
	/* Z cyl */
	glTranslatef(0.0, 0.0, 1.0);
	if(drawflags & MAN_ROT_Z) {
		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Z);
		manipulator_setcolor('Z', colcode);
		draw_cylinder(qobj, cylen, cywid);
	}	
	/* X cyl */
	glTranslatef(1.0, 0.0, -1.0);
	if(drawflags & MAN_ROT_X) {
		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_X);
		glRotatef(90.0, 0.0, 1.0, 0.0);
		manipulator_setcolor('X', colcode);
		draw_cylinder(qobj, cylen, cywid);
		glRotatef(-90.0, 0.0, 1.0, 0.0);
	}	
	/* Y cylinder */
	glTranslatef(-1.0, 1.0, 0.0);
	if(drawflags & MAN_ROT_Y) {
		if(G.f & G_PICKSEL) glLoadName(MAN_ROT_Y);
		glRotatef(-90.0, 1.0, 0.0, 0.0);
		manipulator_setcolor('Y', colcode);
		draw_cylinder(qobj, cylen, cywid);
	}
	
	/* restore */
	glDisable(GL_CULL_FACE);
	glDisable(GL_LIGHTING);
	glFrontFace(GL_CCW);
	
	gluDeleteQuadric(qobj);
	myloadmatrix(G.vd->viewmat);
	
	if(G.zbuf) glEnable(GL_DEPTH_TEST);		// shouldn't be global, tsk!
	
}


static float get_manipulator_drawsize(ScrArea *sa)
{
	View3D *v3d= sa->spacedata.first;
	float size, vec[3], len1, len2;
	
	/* size calculus, depending ortho/persp settings, like initgrabz() */
	size= v3d->persmat[0][3]*v3d->twmat[3][0]+ v3d->persmat[1][3]*v3d->twmat[3][1]+ v3d->persmat[2][3]*v3d->twmat[3][2]+ v3d->persmat[3][3];
	
	VECCOPY(vec, v3d->persinv[0]);
	len1= Normalise(vec);
	VECCOPY(vec, v3d->persinv[1]);
	len2= Normalise(vec);
	
	size*= (0.01f*(float)U.tw_size)*(len1>len2?len1:len2);
	if(U.tw_flag & U_TW_ABSOLUTE) {
		/* correct for relative window size */
		if(sa->winx > sa->winy) size*= 1000.0f/(float)sa->winx;
		else size*= 1000.0f/(float)sa->winy;
	}
	return size;
}

/* exported to transform_constraints.c */
/* mat, vec = default orientation and location */
/* type = transform type */
/* axis = x, y, z, c */
/* col: 0 = colored, 1 = moving, 2 = ghost */
void draw_manipulator_ext(ScrArea *sa, int type, char axis, int col, float vec[3], float mat[][3])
{
	int drawflags= 0;
	float mat4[4][4];
	int colcode;
	
	Mat4CpyMat3(mat4, mat);
	VECCOPY(mat4[3], vec);
	
	Mat4MulFloat3((float *)mat4, get_manipulator_drawsize(sa));
	
	glEnable(GL_BLEND);	// let's do it transparent by default
	if(col==0) colcode= MAN_RGB;
	else if(col==1) colcode= MAN_MOVECOL;
	else colcode= MAN_GREY;
	
	
	if(type==TFM_ROTATION) {
		if(axis=='x') drawflags= MAN_ROT_X;
		else if(axis=='y') drawflags= MAN_ROT_Y;
		else if(axis=='z') drawflags= MAN_ROT_Z;
		else drawflags= MAN_ROT_C;

		draw_manipulator_rotate_cyl(mat4, col, drawflags, V3D_MANIP_ROTATE, colcode);
	}	
	else if(type==TFM_RESIZE) {
		if(axis=='x') drawflags= MAN_SCALE_X;
		else if(axis=='y') drawflags= MAN_SCALE_Y;
		else if(axis=='z') drawflags= MAN_SCALE_Z;
		else drawflags= MAN_SCALE_C;

		draw_manipulator_scale(mat4, col, drawflags, V3D_MANIP_SCALE, colcode);
	}	
	else {
		if(axis=='x') drawflags= MAN_TRANS_X;
		else if(axis=='y') drawflags= MAN_TRANS_Y;
		else if(axis=='z') drawflags= MAN_TRANS_Z;
		else drawflags= MAN_TRANS_C;

		draw_manipulator_translate(mat4, 0, drawflags, V3D_MANIP_TRANSLATE, colcode);
	}	
	

	glDisable(GL_BLEND);
}

/* main call, does calc centers & orientation too */
/* uses global G.moving */
static int drawflags= 0xFFFF;		// only for the calls below, belongs in scene...?
void BIF_draw_manipulator(ScrArea *sa)
{
	View3D *v3d= sa->spacedata.first;
	int totsel;
	
	if(!(v3d->twflag & V3D_USE_MANIPULATOR)) return;
	if(G.moving && (G.moving & G_TRANSFORM_MANIP)==0) return;
	
	if(G.moving==0) {
		v3d->twflag &= ~V3D_DRAW_MANIPULATOR;
		
		totsel= calc_manipulator(sa);
		if(totsel==0) return;
		
		v3d->twflag |= V3D_DRAW_MANIPULATOR;

		/* now we can define centre */
		switch(v3d->around) {
		case V3D_CENTRE:
		case V3D_LOCAL:
			v3d->twmat[3][0]= (G.scene->twmin[0] + G.scene->twmax[0])/2.0;
			v3d->twmat[3][1]= (G.scene->twmin[1] + G.scene->twmax[1])/2.0;
			v3d->twmat[3][2]= (G.scene->twmin[2] + G.scene->twmax[2])/2.0;
			break;
		case V3D_CENTROID:
			VECCOPY(v3d->twmat[3], G.scene->twcent);
			break;
		case V3D_CURSOR:
			VECCOPY(v3d->twmat[3], G.scene->cursor);
			break;
		}
		
		Mat4MulFloat3((float *)v3d->twmat, get_manipulator_drawsize(sa));
	}
	
	if(v3d->twflag & V3D_DRAW_MANIPULATOR) {
		
		if(v3d->twtype & V3D_MANIP_ROTATE) {
			/* rotate has special ghosting draw, for pie chart */
			if(G.moving) draw_manipulator_rotate_ghost(v3d->twmat, drawflags);
			
			if(G.moving) glEnable(GL_BLEND);
			
			if(G.rt==4) {
				if(G.moving) draw_manipulator_rotate_cyl(v3d->twmat, 1, drawflags, v3d->twtype, MAN_MOVECOL);
				else draw_manipulator_rotate_cyl(v3d->twmat, 0, drawflags, v3d->twtype, MAN_RGB);
			}
			else draw_manipulator_rotate(v3d->twmat, G.moving, drawflags, v3d->twtype);
			
			glDisable(GL_BLEND);
		}
		if(v3d->twtype & V3D_MANIP_SCALE) {
			if(G.moving) {
				glEnable(GL_BLEND);
				draw_manipulator_scale(v3d->twmat, 0, drawflags, v3d->twtype, MAN_GREY);
				draw_manipulator_scale(v3d->twmat, 1, drawflags, v3d->twtype, MAN_MOVECOL);
				glDisable(GL_BLEND);
			}
			else draw_manipulator_scale(v3d->twmat, 0, drawflags, v3d->twtype, MAN_RGB);
		}
		if(v3d->twtype & V3D_MANIP_TRANSLATE) {
			if(G.moving) {
				glEnable(GL_BLEND);
				draw_manipulator_translate(v3d->twmat, 0, drawflags, v3d->twtype, MAN_GREY);
				draw_manipulator_translate(v3d->twmat, 1, drawflags, v3d->twtype, MAN_MOVECOL);
				glDisable(GL_BLEND);
			}
			else draw_manipulator_translate(v3d->twmat, 0, drawflags, v3d->twtype, MAN_RGB);
		}
	}
}

static int manipulator_selectbuf(ScrArea *sa, float hotspot)
{
	View3D *v3d= sa->spacedata.first;
	rctf rect;
	GLuint buffer[64];		// max 4 items per select, so large enuf
	short hits, mval[2];
	
	G.f |= G_PICKSEL;
	
	getmouseco_areawin(mval);
	rect.xmin= mval[0]-hotspot;
	rect.xmax= mval[0]+hotspot;
	rect.ymin= mval[1]-hotspot;
	rect.ymax= mval[1]+hotspot;
	
	/* get rid of overlay button matrix */
	persp(PERSP_VIEW);
	
	setwinmatrixview3d(&rect);
	Mat4MulMat4(v3d->persmat, v3d->viewmat, sa->winmat);
	
	glSelectBuffer( 64, buffer);
	glRenderMode(GL_SELECT);
	glInitNames();	/* these two calls whatfor? It doesnt work otherwise */
	glPushName(-2);
	
	/* do the drawing */
	if(v3d->twtype & V3D_MANIP_ROTATE) {
		if(G.rt==4) draw_manipulator_rotate_cyl(v3d->twmat, 0, MAN_ROT_C, v3d->twtype, MAN_RGB);
		else draw_manipulator_rotate(v3d->twmat, 0, MAN_ROT_C, v3d->twtype);
	}
	if(v3d->twtype & V3D_MANIP_SCALE)
		draw_manipulator_scale(v3d->twmat, 0, MAN_SCALE_C, v3d->twtype, MAN_RGB);
	if(v3d->twtype & V3D_MANIP_TRANSLATE)
		draw_manipulator_translate(v3d->twmat, 0, MAN_TRANS_C, v3d->twtype, MAN_RGB);
	
	glPopName();
	hits= glRenderMode(GL_RENDER);
	
	G.f &= ~G_PICKSEL;
	setwinmatrixview3d(0);
	Mat4MulMat4(v3d->persmat, v3d->viewmat, sa->winmat);
	
	persp(PERSP_WIN);
	
	if(hits==1) return buffer[3];
	else if(hits>1) {
		GLuint mindep, minval;
		int a;
		
		/* we compare the hits in buffer, but value centers highest */
		mindep= buffer[1];
		minval= buffer[3];

		for(a=1; a<hits; a++) {
			if(minval==MAN_TRANS_C || minval==MAN_SCALE_C) break;
			
			if(buffer[4*a + 3]==MAN_TRANS_C || buffer[4*a + 3]==MAN_SCALE_C || buffer[4*a + 1] < mindep) {
				mindep= buffer[4*a + 1];
				minval= buffer[4*a + 3];
			}
		}
		return minval;
	}
	return 0;
}

/* return 0; nothing happened */
int BIF_do_manipulator(ScrArea *sa)
{
	View3D *v3d= sa->spacedata.first;
	int val;
	
	if(!(v3d->twflag & V3D_USE_MANIPULATOR)) return 0;
	if(!(v3d->twflag & V3D_DRAW_MANIPULATOR)) return 0;
	
	// find the hotspots first test narrow hotspot
	val= manipulator_selectbuf(sa, 0.5*(float)U.tw_hotspot);
	if(val) {
		short mvalo[2], mval[2];
		
		// drawflags still global, for drawing call above
		drawflags= manipulator_selectbuf(sa, 0.2*(float)U.tw_hotspot);
		if(drawflags==0) drawflags= val;
		
		getmouseco_areawin(mvalo);
		
		switch(drawflags) {
		case MAN_TRANS_C:
			ManipulatorTransform(TFM_TRANSLATION);
			break;
		case MAN_TRANS_X:
			if(G.qual & LR_SHIFTKEY) {
				drawflags= MAN_TRANS_Y|MAN_TRANS_Z;
				BIF_setDualAxisConstraint(v3d->twmat[1], v3d->twmat[2]);
			}
			else
				BIF_setSingleAxisConstraint(v3d->twmat[0], " dX");
			ManipulatorTransform(TFM_TRANSLATION);
			break;
		case MAN_TRANS_Y:
			if(G.qual & LR_SHIFTKEY) {
				drawflags= MAN_TRANS_X|MAN_TRANS_Z;
				BIF_setDualAxisConstraint(v3d->twmat[0], v3d->twmat[2]);
			}
			else
				BIF_setSingleAxisConstraint(v3d->twmat[1], " dY");
			ManipulatorTransform(TFM_TRANSLATION);
			break;
		case MAN_TRANS_Z:
			if(G.qual & LR_SHIFTKEY) {
				drawflags= MAN_TRANS_X|MAN_TRANS_Y;
				BIF_setDualAxisConstraint(v3d->twmat[0], v3d->twmat[1]);
			}
			else
				BIF_setSingleAxisConstraint(v3d->twmat[2], " dZ");
			ManipulatorTransform(TFM_TRANSLATION);
			break;
			
		case MAN_SCALE_C:
			ManipulatorTransform(TFM_RESIZE);
			break;
		case MAN_SCALE_X:
			if(G.qual & LR_SHIFTKEY) {
				drawflags= MAN_SCALE_Y|MAN_SCALE_Z;
				BIF_setDualAxisConstraint(v3d->twmat[1], v3d->twmat[2]);
			}
			else
				BIF_setSingleAxisConstraint(v3d->twmat[0], " SizeX");
			ManipulatorTransform(TFM_RESIZE);
			break;
		case MAN_SCALE_Y:
			if(G.qual & LR_SHIFTKEY) {
				drawflags= MAN_SCALE_X|MAN_SCALE_Z;
				BIF_setDualAxisConstraint(v3d->twmat[0], v3d->twmat[2]);
			}
			else
				BIF_setSingleAxisConstraint(v3d->twmat[1], " SizeY");
			ManipulatorTransform(TFM_RESIZE);
			break;
		case MAN_SCALE_Z:
			if(G.qual & LR_SHIFTKEY) {
				drawflags= MAN_SCALE_X|MAN_SCALE_Y;
				BIF_setDualAxisConstraint(v3d->twmat[0], v3d->twmat[1]);
			}
			else
				BIF_setSingleAxisConstraint(v3d->twmat[2], " SizeZ");
			ManipulatorTransform(TFM_RESIZE);
			break;
		
		case MAN_ROT_X:
			BIF_setSingleAxisConstraint(v3d->twmat[0], " RotX");
			ManipulatorTransform(TFM_ROTATION);
			break;
		case MAN_ROT_Y:
			BIF_setSingleAxisConstraint(v3d->twmat[1], " RotY");
			ManipulatorTransform(TFM_ROTATION);
			break;
		case MAN_ROT_Z:
			BIF_setSingleAxisConstraint(v3d->twmat[2], " RotZ");
			ManipulatorTransform(TFM_ROTATION);
			break;
		case MAN_ROT_T:
			ManipulatorTransform(TFM_TRACKBALL);
			break;			
		case MAN_ROT_V:
			ManipulatorTransform(TFM_ROTATION);
			break;
		}
		
		/* cycling orientation modus */
		getmouseco_areawin(mval);
		if(val==MAN_ROT_T || val==MAN_SCALE_C || val==MAN_TRANS_C) {
			if(mvalo[0]==mval[0] && mvalo[1]==mval[1]) {
				if(v3d->twmode==V3D_MANIP_GLOBAL)
					v3d->twmode= V3D_MANIP_LOCAL;
				else if(v3d->twmode==V3D_MANIP_LOCAL)
					if(G.obedit || G.obpose) v3d->twmode= V3D_MANIP_NORMAL;
					else v3d->twmode= V3D_MANIP_GLOBAL;
				else if(v3d->twmode==V3D_MANIP_NORMAL)
					v3d->twmode= V3D_MANIP_GLOBAL;
				
			}
		}
		
	}
	/* after transform, restore drawflags */
	drawflags= 0xFFFF;
	
	return val;
}