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GPU_immediate_util: add cube drawing function

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Campbell Barton
2017-09-26 17:51:47 +10:00
parent 63dfb5bb97
commit 1eb49f8a2f
2 changed files with 73 additions and 1 deletions
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70
source/blender/gpu/intern/gpu_immediate_util.c
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@@ -33,6 +33,39 @@
#include "GPU_immediate_util.h"
#include "GPU_matrix.h"
static const float cube_coords[8][3] = {
{-1, -1, -1},
{-1, -1, +1},
{-1, +1, -1},
{-1, +1, +1},
{+1, -1, -1},
{+1, -1, +1},
{+1, +1, -1},
{+1, +1, +1},
};
static const int cube_quad_index[6][4] = {
{0, 1, 3, 2},
{0, 2, 6, 4},
{0, 4, 5, 1},
{1, 5, 7, 3},
{2, 3, 7, 6},
{4, 6, 7, 5},
};
static const int cube_line_index[12][2] = {
{0, 1},
{0, 2},
{0, 4},
{1, 3},
{1, 5},
{2, 3},
{2, 6},
{3, 7},
{4, 5},
{4, 6},
{5, 7},
{6, 7},
};
/**
* Pack color into 3 bytes
*
@@ -214,6 +247,43 @@ void imm_draw_box_checker_2d(float x1, float y1, float x2, float y2)
immUnbindProgram();
}
void imm_draw_cube_fill_3d(uint pos, const float co[3], const float aspect[3])
{
float coords[ARRAY_SIZE(cube_coords)][3];
for (int i = 0; i < ARRAY_SIZE(cube_coords); i++) {
madd_v3_v3v3v3(coords[i], co, cube_coords[i], aspect);
}
immBegin(GWN_PRIM_TRIS, ARRAY_SIZE(cube_quad_index) * 3 * 2);
for (int i = 0; i < ARRAY_SIZE(cube_quad_index); i++) {
immVertex3fv(pos, coords[cube_quad_index[i][0]]);
immVertex3fv(pos, coords[cube_quad_index[i][1]]);
immVertex3fv(pos, coords[cube_quad_index[i][2]]);
immVertex3fv(pos, coords[cube_quad_index[i][0]]);
immVertex3fv(pos, coords[cube_quad_index[i][2]]);
immVertex3fv(pos, coords[cube_quad_index[i][3]]);
}
immEnd();
}
void imm_draw_cube_wire_3d(uint pos, const float co[3], const float aspect[3])
{
float coords[ARRAY_SIZE(cube_coords)][3];
for (int i = 0; i < ARRAY_SIZE(cube_coords); i++) {
madd_v3_v3v3v3(coords[i], co, cube_coords[i], aspect);
}
immBegin(GWN_PRIM_LINES, ARRAY_SIZE(cube_line_index) * 2);
for (int i = 0; i < ARRAY_SIZE(cube_line_index); i++) {
immVertex3fv(pos, coords[cube_line_index[i][0]]);
immVertex3fv(pos, coords[cube_line_index[i][1]]);
}
immEnd();
}
/**
* Draw a cylinder. Replacement for gluCylinder.
* _warning_ : Slow, better use it only if you no other choices.