448 lines
11 KiB
C
448 lines
11 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/editors/transform/transform_input.c
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* \ingroup edtransform
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*/
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#include <stdlib.h>
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#include <math.h>
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#include "DNA_screen_types.h"
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#include "BKE_context.h"
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#include "BLI_math.h"
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#include "BLI_utildefines.h"
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#include "WM_types.h"
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#include "WM_api.h"
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#include "transform.h"
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#include "MEM_guardedalloc.h"
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/* ************************** INPUT FROM MOUSE *************************** */
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static void InputVector(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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convertViewVec(t, output, mval[0] - mi->imval[0], mval[1] - mi->imval[1]);
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}
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static void InputSpring(TransInfo *UNUSED(t), MouseInput *mi, const double mval[2], float output[3])
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{
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double dx, dy;
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float ratio;
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dx = ((double)mi->center[0] - mval[0]);
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dy = ((double)mi->center[1] - mval[1]);
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ratio = hypot(dx, dy) / (double)mi->factor;
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output[0] = ratio;
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}
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static void InputSpringFlip(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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InputSpring(t, mi, mval, output);
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/* flip scale */
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/* values can become really big when zoomed in so use longs [#26598] */
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if ((int64_t)((int)mi->center[0] - mval[0]) * (int64_t)((int)mi->center[0] - mi->imval[0]) +
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(int64_t)((int)mi->center[1] - mval[1]) * (int64_t)((int)mi->center[1] - mi->imval[1]) < 0)
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{
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output[0] *= -1.0f;
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}
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}
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static void InputSpringDelta(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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InputSpring(t, mi, mval, output);
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output[0] -= 1.0f;
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}
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static void InputTrackBall(TransInfo *UNUSED(t), MouseInput *mi, const double mval[2], float output[3])
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{
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output[0] = (float)(mi->imval[1] - mval[1]);
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output[1] = (float)(mval[0] - mi->imval[0]);
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output[0] *= mi->factor;
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output[1] *= mi->factor;
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}
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static void InputHorizontalRatio(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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const int winx = t->ar ? t->ar->winx : 1;
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output[0] = ((mval[0] - mi->imval[0]) / winx) * 2.0f;
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}
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static void InputHorizontalAbsolute(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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float vec[3];
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InputVector(t, mi, mval, vec);
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project_v3_v3v3(vec, vec, t->viewinv[0]);
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output[0] = dot_v3v3(t->viewinv[0], vec) * 2.0f;
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}
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static void InputVerticalRatio(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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const int winy = t->ar ? t->ar->winy : 1;
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output[0] = ((mval[1] - mi->imval[1]) / winy) * 2.0f;
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}
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static void InputVerticalAbsolute(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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float vec[3];
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InputVector(t, mi, mval, vec);
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project_v3_v3v3(vec, vec, t->viewinv[1]);
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output[0] = dot_v3v3(t->viewinv[1], vec) * 2.0f;
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}
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void setCustomPoints(TransInfo *UNUSED(t), MouseInput *mi, const int mval_start[2], const int mval_end[2])
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{
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int *data;
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mi->data = MEM_reallocN(mi->data, sizeof(int) * 4);
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data = mi->data;
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data[0] = mval_start[0];
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data[1] = mval_start[1];
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data[2] = mval_end[0];
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data[3] = mval_end[1];
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}
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static void InputCustomRatioFlip(TransInfo *UNUSED(t), MouseInput *mi, const double mval[2], float output[3])
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{
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double length;
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double distance;
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double dx, dy;
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const int *data = mi->data;
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if (data) {
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int mdx, mdy;
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dx = data[2] - data[0];
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dy = data[3] - data[1];
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length = hypot(dx, dy);
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mdx = mval[0] - data[2];
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mdy = mval[1] - data[3];
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distance = (length != 0.0) ? (mdx * dx + mdy * dy) / length : 0.0;
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output[0] = (length != 0.0) ? (double)(distance / length) : 0.0;
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}
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}
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static void InputCustomRatio(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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InputCustomRatioFlip(t, mi, mval, output);
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output[0] = -output[0];
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}
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struct InputAngle_Data {
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double angle;
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double mval_prev[2];
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};
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static void InputAngle(TransInfo *UNUSED(t), MouseInput *mi, const double mval[2], float output[3])
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{
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struct InputAngle_Data *data = mi->data;
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double dx2 = mval[0] - (double)mi->center[0];
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double dy2 = mval[1] - (double)mi->center[1];
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double B = sqrt(dx2 * dx2 + dy2 * dy2);
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double dx1 = data->mval_prev[0] - (double)mi->center[0];
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double dy1 = data->mval_prev[1] - (double)mi->center[1];
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double A = sqrt(dx1 * dx1 + dy1 * dy1);
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double dx3 = mval[0] - data->mval_prev[0];
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double dy3 = mval[1] - data->mval_prev[1];
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/* use doubles here, to make sure a "1.0" (no rotation) doesn't become 9.999999e-01, which gives 0.02 for acos */
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double deler = (((dx1 * dx1 + dy1 * dy1) +
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(dx2 * dx2 + dy2 * dy2) -
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(dx3 * dx3 + dy3 * dy3)) / (2.0 * (((A * B) != 0.0) ? (A * B) : 1.0)));
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/* ((A * B) ? (A * B) : 1.0) this takes care of potential divide by zero errors */
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float dphi;
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dphi = saacos((float)deler);
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if ((dx1 * dy2 - dx2 * dy1) > 0.0) dphi = -dphi;
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/* If the angle is zero, because of lack of precision close to the 1.0 value in acos
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* approximate the angle with the opposite side of the normalized triangle
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* This is a good approximation here since the smallest acos value seems to be around
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* 0.02 degree and lower values don't even have a 0.01% error compared to the approximation
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*/
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if (dphi == 0) {
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double dx, dy;
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dx2 /= A;
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dy2 /= A;
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dx1 /= B;
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dy1 /= B;
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dx = dx1 - dx2;
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dy = dy1 - dy2;
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dphi = sqrt(dx * dx + dy * dy);
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if ((dx1 * dy2 - dx2 * dy1) > 0.0) dphi = -dphi;
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}
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data->angle += ((double)dphi) * (mi->precision ? (double)mi->precision_factor : 1.0);
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data->mval_prev[0] = mval[0];
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data->mval_prev[1] = mval[1];
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output[0] = data->angle;
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}
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static void InputAngleSpring(TransInfo *t, MouseInput *mi, const double mval[2], float output[3])
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{
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float toutput[3];
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InputAngle(t, mi, mval, output);
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InputSpring(t, mi, mval, toutput);
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output[1] = toutput[0];
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}
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void initMouseInput(TransInfo *UNUSED(t), MouseInput *mi, const float center[2], const int mval[2], const bool precision)
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{
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mi->factor = 0;
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mi->precision = precision;
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mi->center[0] = center[0];
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mi->center[1] = center[1];
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mi->imval[0] = mval[0];
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mi->imval[1] = mval[1];
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mi->post = NULL;
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}
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static void calcSpringFactor(MouseInput *mi)
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{
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mi->factor = sqrtf(((float)(mi->center[1] - mi->imval[1])) * ((float)(mi->center[1] - mi->imval[1])) +
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((float)(mi->center[0] - mi->imval[0])) * ((float)(mi->center[0] - mi->imval[0])));
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if (mi->factor == 0.0f) {
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mi->factor = 1.0f; /* prevent Inf */
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}
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}
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void initMouseInputMode(TransInfo *t, MouseInput *mi, MouseInputMode mode)
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{
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/* incase we allocate a new value */
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void *mi_data_prev = mi->data;
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mi->use_virtual_mval = true;
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mi->precision_factor = 1.0f / 10.0f;
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switch (mode) {
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case INPUT_VECTOR:
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mi->apply = InputVector;
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t->helpline = HLP_NONE;
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break;
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case INPUT_SPRING:
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calcSpringFactor(mi);
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mi->apply = InputSpring;
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t->helpline = HLP_SPRING;
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break;
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case INPUT_SPRING_FLIP:
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calcSpringFactor(mi);
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mi->apply = InputSpringFlip;
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t->helpline = HLP_SPRING;
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break;
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case INPUT_SPRING_DELTA:
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calcSpringFactor(mi);
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mi->apply = InputSpringDelta;
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t->helpline = HLP_SPRING;
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break;
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case INPUT_ANGLE:
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case INPUT_ANGLE_SPRING:
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{
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struct InputAngle_Data *data;
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mi->use_virtual_mval = false;
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mi->precision_factor = 1.0f / 30.0f;
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data = MEM_callocN(sizeof(struct InputAngle_Data), "angle accumulator");
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data->mval_prev[0] = mi->imval[0];
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data->mval_prev[1] = mi->imval[1];
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mi->data = data;
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if (mode == INPUT_ANGLE) {
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mi->apply = InputAngle;
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}
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else {
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calcSpringFactor(mi);
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mi->apply = InputAngleSpring;
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}
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t->helpline = HLP_ANGLE;
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break;
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}
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case INPUT_TRACKBALL:
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mi->precision_factor = 1.0f / 30.0f;
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/* factor has to become setting or so */
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mi->factor = 0.01f;
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mi->apply = InputTrackBall;
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t->helpline = HLP_TRACKBALL;
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break;
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case INPUT_HORIZONTAL_RATIO:
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mi->apply = InputHorizontalRatio;
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t->helpline = HLP_HARROW;
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break;
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case INPUT_HORIZONTAL_ABSOLUTE:
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mi->apply = InputHorizontalAbsolute;
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t->helpline = HLP_HARROW;
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break;
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case INPUT_VERTICAL_RATIO:
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mi->apply = InputVerticalRatio;
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t->helpline = HLP_VARROW;
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break;
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case INPUT_VERTICAL_ABSOLUTE:
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mi->apply = InputVerticalAbsolute;
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t->helpline = HLP_VARROW;
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break;
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case INPUT_CUSTOM_RATIO:
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mi->apply = InputCustomRatio;
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t->helpline = HLP_NONE;
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break;
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case INPUT_CUSTOM_RATIO_FLIP:
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mi->apply = InputCustomRatioFlip;
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t->helpline = HLP_NONE;
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break;
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case INPUT_NONE:
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default:
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mi->apply = NULL;
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break;
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}
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/* setup for the mouse cursor: either set a custom one,
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* or hide it if it will be drawn with the helpline */
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wmWindow *win = CTX_wm_window(t->context);
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switch (t->helpline) {
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case HLP_NONE:
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/* INPUT_VECTOR, INPUT_CUSTOM_RATIO, INPUT_CUSTOM_RATIO_FLIP */
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if (t->flag & T_MODAL) {
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WM_cursor_set(win, BC_NSEW_SCROLLCURSOR);
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}
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break;
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case HLP_SPRING:
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case HLP_ANGLE:
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case HLP_TRACKBALL:
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case HLP_HARROW:
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case HLP_VARROW:
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if (t->flag & T_MODAL) {
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WM_cursor_set(win, CURSOR_NONE);
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}
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break;
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default:
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break;
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}
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/* if we've allocated new data, free the old data
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* less hassle then checking before every alloc above */
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if (mi_data_prev && (mi_data_prev != mi->data)) {
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MEM_freeN(mi_data_prev);
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}
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/* bootstrap mouse input with initial values */
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applyMouseInput(t, mi, mi->imval, t->values);
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}
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void setInputPostFct(MouseInput *mi, void (*post)(struct TransInfo *t, float values[3]))
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{
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mi->post = post;
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}
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void applyMouseInput(TransInfo *t, MouseInput *mi, const int mval[2], float output[3])
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{
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double mval_db[2];
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if (mi->use_virtual_mval) {
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/* update accumulator */
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double mval_delta[2];
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mval_delta[0] = (mval[0] - mi->imval[0]) - mi->virtual_mval.prev[0];
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mval_delta[1] = (mval[1] - mi->imval[1]) - mi->virtual_mval.prev[1];
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mi->virtual_mval.prev[0] += mval_delta[0];
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mi->virtual_mval.prev[1] += mval_delta[1];
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if (mi->precision) {
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mval_delta[0] *= (double)mi->precision_factor;
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mval_delta[1] *= (double)mi->precision_factor;
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}
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mi->virtual_mval.accum[0] += mval_delta[0];
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mi->virtual_mval.accum[1] += mval_delta[1];
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mval_db[0] = mi->imval[0] + mi->virtual_mval.accum[0];
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mval_db[1] = mi->imval[1] + mi->virtual_mval.accum[1];
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}
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else {
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mval_db[0] = mval[0];
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mval_db[1] = mval[1];
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}
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if (mi->apply != NULL) {
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mi->apply(t, mi, mval_db, output);
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}
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if (mi->post) {
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mi->post(t, output);
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}
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}
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eRedrawFlag handleMouseInput(TransInfo *t, MouseInput *mi, const wmEvent *event)
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{
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eRedrawFlag redraw = TREDRAW_NOTHING;
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switch (event->type) {
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case LEFTSHIFTKEY:
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case RIGHTSHIFTKEY:
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if (event->val == KM_PRESS) {
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t->modifiers |= MOD_PRECISION;
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/* shift is modifier for higher precision transforn */
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mi->precision = 1;
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redraw = TREDRAW_HARD;
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}
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else if (event->val == KM_RELEASE) {
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t->modifiers &= ~MOD_PRECISION;
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mi->precision = 0;
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redraw = TREDRAW_HARD;
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}
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break;
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}
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return redraw;
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}
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