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/*
* Copyright 2018, Blender Foundation.
*
* 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.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor(s): Blender Institute
*
*/
/** \file blender/draw/intern/draw_debug.c
* \ingroup draw
*
* \brief Simple API to draw debug shapes in the viewport.
*/
#include "MEM_guardedalloc.h"
#include "DNA_object_types.h"
#include "BLI_link_utils.h"
#include "GPU_immediate.h"
#include "draw_debug.h"
#include "draw_manager.h"
/* --------- Register --------- */
/* Matrix applied to all points before drawing. Could be a stack if needed. */
static float g_modelmat[4][4];
void DRW_debug_modelmat_reset(void)
{
unit_m4(g_modelmat);
}
void DRW_debug_modelmat(const float modelmat[4][4])
{
copy_m4_m4(g_modelmat, modelmat);
}
void DRW_debug_line_v3v3(const float v1[3], const float v2[3], const float color[4])
{
DRWDebugLine *line = MEM_mallocN(sizeof(DRWDebugLine), "DRWDebugLine");
mul_v3_m4v3(line->pos[0], g_modelmat, v1);
mul_v3_m4v3(line->pos[1], g_modelmat, v2);
copy_v4_v4(line->color, color);
BLI_LINKS_PREPEND(DST.debug.lines, line);
}
void DRW_debug_polygon_v3(const float (*v)[3], const int vert_len, const float color[4])
{
BLI_assert(vert_len > 1);
for (int i = 0; i < vert_len; ++i) {
DRW_debug_line_v3v3(v[i], v[(i + 1) % vert_len], color);
}
}
/* NOTE: g_modelmat is still applied on top. */
void DRW_debug_m4(const float m[4][4])
{
float v0[3] = {0.0f, 0.0f, 0.0f};
float v1[3] = {1.0f, 0.0f, 0.0f};
float v2[3] = {0.0f, 1.0f, 0.0f};
float v3[3] = {0.0f, 0.0f, 1.0f};
mul_m4_v3(m, v0);
mul_m4_v3(m, v1);
mul_m4_v3(m, v2);
mul_m4_v3(m, v3);
DRW_debug_line_v3v3(v0, v1, (float[4]){1.0f, 0.0f, 0.0f, 1.0f});
DRW_debug_line_v3v3(v0, v2, (float[4]){0.0f, 1.0f, 0.0f, 1.0f});
DRW_debug_line_v3v3(v0, v3, (float[4]){0.0f, 0.0f, 1.0f, 1.0f});
}
void DRW_debug_bbox(const BoundBox *bbox, const float color[4])
{
DRW_debug_line_v3v3(bbox->vec[0], bbox->vec[1], color);
DRW_debug_line_v3v3(bbox->vec[1], bbox->vec[2], color);
DRW_debug_line_v3v3(bbox->vec[2], bbox->vec[3], color);
DRW_debug_line_v3v3(bbox->vec[3], bbox->vec[0], color);
DRW_debug_line_v3v3(bbox->vec[4], bbox->vec[5], color);
DRW_debug_line_v3v3(bbox->vec[5], bbox->vec[6], color);
DRW_debug_line_v3v3(bbox->vec[6], bbox->vec[7], color);
DRW_debug_line_v3v3(bbox->vec[7], bbox->vec[4], color);
DRW_debug_line_v3v3(bbox->vec[0], bbox->vec[4], color);
DRW_debug_line_v3v3(bbox->vec[1], bbox->vec[5], color);
DRW_debug_line_v3v3(bbox->vec[2], bbox->vec[6], color);
DRW_debug_line_v3v3(bbox->vec[3], bbox->vec[7], color);
}
/* --------- Render --------- */
static void drw_debug_draw_lines(void)
{
int count = BLI_linklist_count((LinkNode *)DST.debug.lines);
if (count == 0) {
return;
}
Gwn_VertFormat *vert_format = immVertexFormat();
uint pos = GWN_vertformat_attr_add(vert_format, "pos", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
uint col = GWN_vertformat_attr_add(vert_format, "color", GWN_COMP_F32, 4, GWN_FETCH_FLOAT);
immBindBuiltinProgram(GPU_SHADER_3D_FLAT_COLOR);
immBegin(GWN_PRIM_LINES, count * 2);
while (DST.debug.lines) {
void *next = DST.debug.lines->next;
immAttrib4fv(col, DST.debug.lines->color);
immVertex3fv(pos, DST.debug.lines->pos[0]);
immAttrib4fv(col, DST.debug.lines->color);
immVertex3fv(pos, DST.debug.lines->pos[1]);
MEM_freeN(DST.debug.lines);
DST.debug.lines = next;
}
immEnd();
immUnbindProgram();
}
void drw_debug_draw(void)
{
drw_debug_draw_lines();
}
void drw_debug_init(void)
{
DRW_debug_modelmat_reset();
}
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