Campbell Barton
e12c08e8d1
Apply clang format as proposed in T53211. For details on usage and instructions for migrating branches without conflicts, see: https://wiki.blender.org/wiki/Tools/ClangFormat
553 lines
17 KiB
C
553 lines
17 KiB
C
/*
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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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/** \file
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* \ingroup gpu
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*
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* GPU immediate mode drawing utilities
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*/
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#include <stdio.h>
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#include <string.h>
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#include "BLI_utildefines.h"
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#include "BLI_math.h"
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#include "GPU_immediate.h"
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#include "GPU_immediate_util.h"
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#include "GPU_matrix.h"
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static const float cube_coords[8][3] = {
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{-1, -1, -1},
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{-1, -1, +1},
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{-1, +1, -1},
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{-1, +1, +1},
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{+1, -1, -1},
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{+1, -1, +1},
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{+1, +1, -1},
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{+1, +1, +1},
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};
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static const int cube_quad_index[6][4] = {
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{0, 1, 3, 2},
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{0, 2, 6, 4},
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{0, 4, 5, 1},
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{1, 5, 7, 3},
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{2, 3, 7, 6},
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{4, 6, 7, 5},
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};
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static const int cube_line_index[12][2] = {
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{0, 1},
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{0, 2},
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{0, 4},
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{1, 3},
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{1, 5},
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{2, 3},
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{2, 6},
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{3, 7},
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{4, 5},
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{4, 6},
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{5, 7},
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{6, 7},
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};
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void immRectf(uint pos, float x1, float y1, float x2, float y2)
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{
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immBegin(GPU_PRIM_TRI_FAN, 4);
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immVertex2f(pos, x1, y1);
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immVertex2f(pos, x2, y1);
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immVertex2f(pos, x2, y2);
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immVertex2f(pos, x1, y2);
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immEnd();
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}
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void immRecti(uint pos, int x1, int y1, int x2, int y2)
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{
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immBegin(GPU_PRIM_TRI_FAN, 4);
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immVertex2i(pos, x1, y1);
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immVertex2i(pos, x2, y1);
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immVertex2i(pos, x2, y2);
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immVertex2i(pos, x1, y2);
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immEnd();
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}
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void immRectf_fast(uint pos, float x1, float y1, float x2, float y2)
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{
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immVertex2f(pos, x1, y1);
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immVertex2f(pos, x2, y1);
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immVertex2f(pos, x2, y2);
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immVertex2f(pos, x1, y1);
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immVertex2f(pos, x2, y2);
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immVertex2f(pos, x1, y2);
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}
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void immRectf_fast_with_color(
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uint pos, uint col, float x1, float y1, float x2, float y2, const float color[4])
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{
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immAttr4fv(col, color);
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immVertex2f(pos, x1, y1);
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immAttr4fv(col, color);
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immVertex2f(pos, x2, y1);
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immAttr4fv(col, color);
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immVertex2f(pos, x2, y2);
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immAttr4fv(col, color);
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immVertex2f(pos, x1, y1);
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immAttr4fv(col, color);
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immVertex2f(pos, x2, y2);
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immAttr4fv(col, color);
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immVertex2f(pos, x1, y2);
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}
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void immRecti_fast_with_color(
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uint pos, uint col, int x1, int y1, int x2, int y2, const float color[4])
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{
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immAttr4fv(col, color);
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immVertex2i(pos, x1, y1);
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immAttr4fv(col, color);
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immVertex2i(pos, x2, y1);
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immAttr4fv(col, color);
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immVertex2i(pos, x2, y2);
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immAttr4fv(col, color);
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immVertex2i(pos, x1, y1);
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immAttr4fv(col, color);
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immVertex2i(pos, x2, y2);
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immAttr4fv(col, color);
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immVertex2i(pos, x1, y2);
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}
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#if 0 /* more complete version in case we want that */
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void immRecti_complete(int x1, int y1, int x2, int y2, const float color[4])
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{
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GPUVertFormat *format = immVertexFormat();
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uint pos = add_attr(format, "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
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immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
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immUniformColor4fv(color);
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immRecti(pos, x1, y1, x2, y2);
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immUnbindProgram();
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}
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#endif
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/**
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* Pack color into 3 bytes
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*
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* This define converts a numerical value to the equivalent 24-bit
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* color, while not being endian-sensitive. On little-endian, this
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* is the same as doing a 'naive' indexing, on big-endian, it is not!
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*
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* \note BGR format (i.e. 0xBBGGRR)...
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*
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* \param x: color.
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*/
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void imm_cpack(uint x)
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{
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immUniformColor3ub(((x)&0xFF), (((x) >> 8) & 0xFF), (((x) >> 16) & 0xFF));
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}
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static void imm_draw_circle(GPUPrimType prim_type,
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const uint shdr_pos,
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float x,
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float y,
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float rad_x,
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float rad_y,
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int nsegments)
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{
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immBegin(prim_type, nsegments);
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for (int i = 0; i < nsegments; ++i) {
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const float angle = (float)(2 * M_PI) * ((float)i / (float)nsegments);
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immVertex2f(shdr_pos, x + (rad_x * cosf(angle)), y + (rad_y * sinf(angle)));
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}
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immEnd();
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}
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/**
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* Draw a circle outline with the given \a radius.
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* The circle is centered at \a x, \a y and drawn in the XY plane.
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*
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* \param shdr_pos: The vertex attribute number for position.
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* \param x: Horizontal center.
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* \param y: Vertical center.
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* \param rad: The circle's radius.
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* \param nsegments: The number of segments to use in drawing (more = smoother).
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*/
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void imm_draw_circle_wire_2d(uint shdr_pos, float x, float y, float rad, int nsegments)
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{
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imm_draw_circle(GPU_PRIM_LINE_LOOP, shdr_pos, x, y, rad, rad, nsegments);
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}
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/**
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* Draw a filled circle with the given \a radius.
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* The circle is centered at \a x, \a y and drawn in the XY plane.
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*
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* \param shdr_pos: The vertex attribute number for position.
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* \param x: Horizontal center.
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* \param y: Vertical center.
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* \param rad: The circle's radius.
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* \param nsegments: The number of segments to use in drawing (more = smoother).
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*/
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void imm_draw_circle_fill_2d(uint shdr_pos, float x, float y, float rad, int nsegments)
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{
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imm_draw_circle(GPU_PRIM_TRI_FAN, shdr_pos, x, y, rad, rad, nsegments);
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}
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void imm_draw_circle_wire_aspect_2d(
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uint shdr_pos, float x, float y, float rad_x, float rad_y, int nsegments)
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{
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imm_draw_circle(GPU_PRIM_LINE_LOOP, shdr_pos, x, y, rad_x, rad_y, nsegments);
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}
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void imm_draw_circle_fill_aspect_2d(
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uint shdr_pos, float x, float y, float rad_x, float rad_y, int nsegments)
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{
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imm_draw_circle(GPU_PRIM_TRI_FAN, shdr_pos, x, y, rad_x, rad_y, nsegments);
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}
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static void imm_draw_circle_partial(GPUPrimType prim_type,
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uint pos,
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float x,
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float y,
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float rad,
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int nsegments,
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float start,
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float sweep)
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{
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/* shift & reverse angle, increase 'nsegments' to match gluPartialDisk */
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const float angle_start = -(DEG2RADF(start)) + (float)(M_PI / 2);
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const float angle_end = -(DEG2RADF(sweep) - angle_start);
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nsegments += 1;
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immBegin(prim_type, nsegments);
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for (int i = 0; i < nsegments; ++i) {
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const float angle = interpf(angle_start, angle_end, ((float)i / (float)(nsegments - 1)));
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const float angle_sin = sinf(angle);
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const float angle_cos = cosf(angle);
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immVertex2f(pos, x + rad * angle_cos, y + rad * angle_sin);
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}
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immEnd();
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}
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void imm_draw_circle_partial_wire_2d(
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uint pos, float x, float y, float rad, int nsegments, float start, float sweep)
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{
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imm_draw_circle_partial(GPU_PRIM_LINE_STRIP, pos, x, y, rad, nsegments, start, sweep);
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}
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static void imm_draw_disk_partial(GPUPrimType prim_type,
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uint pos,
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float x,
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float y,
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float rad_inner,
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float rad_outer,
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int nsegments,
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float start,
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float sweep)
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{
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/* to avoid artifacts */
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const float max_angle = 3 * 360;
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CLAMP(sweep, -max_angle, max_angle);
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/* shift & reverse angle, increase 'nsegments' to match gluPartialDisk */
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const float angle_start = -(DEG2RADF(start)) + (float)(M_PI / 2);
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const float angle_end = -(DEG2RADF(sweep) - angle_start);
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nsegments += 1;
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immBegin(prim_type, nsegments * 2);
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for (int i = 0; i < nsegments; ++i) {
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const float angle = interpf(angle_start, angle_end, ((float)i / (float)(nsegments - 1)));
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const float angle_sin = sinf(angle);
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const float angle_cos = cosf(angle);
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immVertex2f(pos, x + rad_inner * angle_cos, y + rad_inner * angle_sin);
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immVertex2f(pos, x + rad_outer * angle_cos, y + rad_outer * angle_sin);
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}
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immEnd();
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}
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/**
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* Draw a filled arc with the given inner and outer radius.
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* The circle is centered at \a x, \a y and drawn in the XY plane.
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*
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* \note Arguments are `gluPartialDisk` compatible.
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*
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* \param pos: The vertex attribute number for position.
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* \param x: Horizontal center.
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* \param y: Vertical center.
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* \param rad_inner: The inner circle's radius.
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* \param rad_outer: The outer circle's radius (can be zero).
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* \param nsegments: The number of segments to use in drawing (more = smoother).
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* \param start: Specifies the starting angle, in degrees, of the disk portion.
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* \param sweep: Specifies the sweep angle, in degrees, of the disk portion.
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*/
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void imm_draw_disk_partial_fill_2d(uint pos,
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float x,
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float y,
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float rad_inner,
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float rad_outer,
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int nsegments,
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float start,
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float sweep)
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{
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imm_draw_disk_partial(
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GPU_PRIM_TRI_STRIP, pos, x, y, rad_inner, rad_outer, nsegments, start, sweep);
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}
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static void imm_draw_circle_3D(
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GPUPrimType prim_type, uint pos, float x, float y, float rad, int nsegments)
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{
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immBegin(prim_type, nsegments);
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for (int i = 0; i < nsegments; ++i) {
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float angle = (float)(2 * M_PI) * ((float)i / (float)nsegments);
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immVertex3f(pos, x + rad * cosf(angle), y + rad * sinf(angle), 0.0f);
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}
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immEnd();
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}
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void imm_draw_circle_wire_3d(uint pos, float x, float y, float rad, int nsegments)
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{
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imm_draw_circle_3D(GPU_PRIM_LINE_LOOP, pos, x, y, rad, nsegments);
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}
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void imm_draw_circle_fill_3d(uint pos, float x, float y, float rad, int nsegments)
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{
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imm_draw_circle_3D(GPU_PRIM_TRI_FAN, pos, x, y, rad, nsegments);
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}
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/**
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* Draw a lined box.
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*
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* \param pos: The vertex attribute number for position.
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* \param x1: left.
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* \param y1: bottom.
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* \param x2: right.
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* \param y2: top.
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*/
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void imm_draw_box_wire_2d(uint pos, float x1, float y1, float x2, float y2)
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{
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immBegin(GPU_PRIM_LINE_LOOP, 4);
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immVertex2f(pos, x1, y1);
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immVertex2f(pos, x1, y2);
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immVertex2f(pos, x2, y2);
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immVertex2f(pos, x2, y1);
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immEnd();
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}
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void imm_draw_box_wire_3d(uint pos, float x1, float y1, float x2, float y2)
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{
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/* use this version when GPUVertFormat has a vec3 position */
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immBegin(GPU_PRIM_LINE_LOOP, 4);
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immVertex3f(pos, x1, y1, 0.0f);
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immVertex3f(pos, x1, y2, 0.0f);
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immVertex3f(pos, x2, y2, 0.0f);
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immVertex3f(pos, x2, y1, 0.0f);
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immEnd();
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}
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/**
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* Draw a standard checkerboard to indicate transparent backgrounds.
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*/
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void imm_draw_box_checker_2d(float x1, float y1, float x2, float y2)
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{
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uint pos = GPU_vertformat_attr_add(immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
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immBindBuiltinProgram(GPU_SHADER_2D_CHECKER);
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immUniform4f("color1", 0.15f, 0.15f, 0.15f, 1.0f);
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immUniform4f("color2", 0.2f, 0.2f, 0.2f, 1.0f);
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immUniform1i("size", 8);
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immRectf(pos, x1, y1, x2, y2);
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immUnbindProgram();
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}
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void imm_draw_cube_fill_3d(uint pos, const float co[3], const float aspect[3])
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{
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float coords[ARRAY_SIZE(cube_coords)][3];
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for (int i = 0; i < ARRAY_SIZE(cube_coords); i++) {
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madd_v3_v3v3v3(coords[i], co, cube_coords[i], aspect);
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}
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immBegin(GPU_PRIM_TRIS, ARRAY_SIZE(cube_quad_index) * 3 * 2);
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for (int i = 0; i < ARRAY_SIZE(cube_quad_index); i++) {
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immVertex3fv(pos, coords[cube_quad_index[i][0]]);
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immVertex3fv(pos, coords[cube_quad_index[i][1]]);
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immVertex3fv(pos, coords[cube_quad_index[i][2]]);
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immVertex3fv(pos, coords[cube_quad_index[i][0]]);
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immVertex3fv(pos, coords[cube_quad_index[i][2]]);
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immVertex3fv(pos, coords[cube_quad_index[i][3]]);
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}
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immEnd();
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}
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void imm_draw_cube_wire_3d(uint pos, const float co[3], const float aspect[3])
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{
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float coords[ARRAY_SIZE(cube_coords)][3];
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for (int i = 0; i < ARRAY_SIZE(cube_coords); i++) {
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madd_v3_v3v3v3(coords[i], co, cube_coords[i], aspect);
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}
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immBegin(GPU_PRIM_LINES, ARRAY_SIZE(cube_line_index) * 2);
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for (int i = 0; i < ARRAY_SIZE(cube_line_index); i++) {
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immVertex3fv(pos, coords[cube_line_index[i][0]]);
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immVertex3fv(pos, coords[cube_line_index[i][1]]);
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}
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immEnd();
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}
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/**
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* Draw a cylinder. Replacement for gluCylinder.
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* _warning_ : Slow, better use it only if you no other choices.
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*
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* \param pos: The vertex attribute number for position.
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* \param nor: The vertex attribute number for normal.
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* \param base: Specifies the radius of the cylinder at z = 0.
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* \param top: Specifies the radius of the cylinder at z = height.
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* \param height: Specifies the height of the cylinder.
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* \param slices: Specifies the number of subdivisions around the z axis.
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* \param stacks: Specifies the number of subdivisions along the z axis.
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*/
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void imm_draw_cylinder_fill_normal_3d(
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uint pos, uint nor, float base, float top, float height, int slices, int stacks)
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{
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immBegin(GPU_PRIM_TRIS, 6 * slices * stacks);
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for (int i = 0; i < slices; ++i) {
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const float angle1 = (float)(2 * M_PI) * ((float)i / (float)slices);
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const float angle2 = (float)(2 * M_PI) * ((float)(i + 1) / (float)slices);
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const float cos1 = cosf(angle1);
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const float sin1 = sinf(angle1);
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const float cos2 = cosf(angle2);
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const float sin2 = sinf(angle2);
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for (int j = 0; j < stacks; ++j) {
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float fac1 = (float)j / (float)stacks;
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float fac2 = (float)(j + 1) / (float)stacks;
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float r1 = base * (1.f - fac1) + top * fac1;
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float r2 = base * (1.f - fac2) + top * fac2;
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float h1 = height * ((float)j / (float)stacks);
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float h2 = height * ((float)(j + 1) / (float)stacks);
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float v1[3] = {r1 * cos2, r1 * sin2, h1};
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float v2[3] = {r2 * cos2, r2 * sin2, h2};
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float v3[3] = {r2 * cos1, r2 * sin1, h2};
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float v4[3] = {r1 * cos1, r1 * sin1, h1};
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float n1[3], n2[3];
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/* calc normals */
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sub_v3_v3v3(n1, v2, v1);
|
|
normalize_v3(n1);
|
|
n1[0] = cos1;
|
|
n1[1] = sin1;
|
|
n1[2] = 1 - n1[2];
|
|
|
|
sub_v3_v3v3(n2, v3, v4);
|
|
normalize_v3(n2);
|
|
n2[0] = cos2;
|
|
n2[1] = sin2;
|
|
n2[2] = 1 - n2[2];
|
|
|
|
/* first tri */
|
|
immAttr3fv(nor, n2);
|
|
immVertex3fv(pos, v1);
|
|
immVertex3fv(pos, v2);
|
|
immAttr3fv(nor, n1);
|
|
immVertex3fv(pos, v3);
|
|
|
|
/* second tri */
|
|
immVertex3fv(pos, v3);
|
|
immVertex3fv(pos, v4);
|
|
immAttr3fv(nor, n2);
|
|
immVertex3fv(pos, v1);
|
|
}
|
|
}
|
|
immEnd();
|
|
}
|
|
|
|
void imm_draw_cylinder_wire_3d(
|
|
uint pos, float base, float top, float height, int slices, int stacks)
|
|
{
|
|
immBegin(GPU_PRIM_LINES, 6 * slices * stacks);
|
|
for (int i = 0; i < slices; ++i) {
|
|
const float angle1 = (float)(2 * M_PI) * ((float)i / (float)slices);
|
|
const float angle2 = (float)(2 * M_PI) * ((float)(i + 1) / (float)slices);
|
|
const float cos1 = cosf(angle1);
|
|
const float sin1 = sinf(angle1);
|
|
const float cos2 = cosf(angle2);
|
|
const float sin2 = sinf(angle2);
|
|
|
|
for (int j = 0; j < stacks; ++j) {
|
|
float fac1 = (float)j / (float)stacks;
|
|
float fac2 = (float)(j + 1) / (float)stacks;
|
|
float r1 = base * (1.f - fac1) + top * fac1;
|
|
float r2 = base * (1.f - fac2) + top * fac2;
|
|
float h1 = height * ((float)j / (float)stacks);
|
|
float h2 = height * ((float)(j + 1) / (float)stacks);
|
|
|
|
float v1[3] = {r1 * cos2, r1 * sin2, h1};
|
|
float v2[3] = {r2 * cos2, r2 * sin2, h2};
|
|
float v3[3] = {r2 * cos1, r2 * sin1, h2};
|
|
float v4[3] = {r1 * cos1, r1 * sin1, h1};
|
|
|
|
immVertex3fv(pos, v1);
|
|
immVertex3fv(pos, v2);
|
|
|
|
immVertex3fv(pos, v2);
|
|
immVertex3fv(pos, v3);
|
|
|
|
immVertex3fv(pos, v1);
|
|
immVertex3fv(pos, v4);
|
|
}
|
|
}
|
|
immEnd();
|
|
}
|
|
|
|
void imm_draw_cylinder_fill_3d(
|
|
uint pos, float base, float top, float height, int slices, int stacks)
|
|
{
|
|
immBegin(GPU_PRIM_TRIS, 6 * slices * stacks);
|
|
for (int i = 0; i < slices; ++i) {
|
|
const float angle1 = (float)(2 * M_PI) * ((float)i / (float)slices);
|
|
const float angle2 = (float)(2 * M_PI) * ((float)(i + 1) / (float)slices);
|
|
const float cos1 = cosf(angle1);
|
|
const float sin1 = sinf(angle1);
|
|
const float cos2 = cosf(angle2);
|
|
const float sin2 = sinf(angle2);
|
|
|
|
for (int j = 0; j < stacks; ++j) {
|
|
float fac1 = (float)j / (float)stacks;
|
|
float fac2 = (float)(j + 1) / (float)stacks;
|
|
float r1 = base * (1.f - fac1) + top * fac1;
|
|
float r2 = base * (1.f - fac2) + top * fac2;
|
|
float h1 = height * ((float)j / (float)stacks);
|
|
float h2 = height * ((float)(j + 1) / (float)stacks);
|
|
|
|
float v1[3] = {r1 * cos2, r1 * sin2, h1};
|
|
float v2[3] = {r2 * cos2, r2 * sin2, h2};
|
|
float v3[3] = {r2 * cos1, r2 * sin1, h2};
|
|
float v4[3] = {r1 * cos1, r1 * sin1, h1};
|
|
|
|
/* first tri */
|
|
immVertex3fv(pos, v1);
|
|
immVertex3fv(pos, v2);
|
|
immVertex3fv(pos, v3);
|
|
|
|
/* second tri */
|
|
immVertex3fv(pos, v3);
|
|
immVertex3fv(pos, v4);
|
|
immVertex3fv(pos, v1);
|
|
}
|
|
}
|
|
immEnd();
|
|
}
|