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DRW: Add Adjacency info for bone shapes.

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Only for cube and octahedral shapes for now.
This commit is contained in:
Clément Foucault
2018-04-22 21:55:05 +02:00
parent 0c47a83fb9
commit 77b481fd5a
1 changed files with 99 additions and 5 deletions
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104
source/blender/draw/intern/draw_cache.c
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@@ -1535,6 +1535,22 @@ static const float bone_octahedral_verts[6][3] = {
{ 0.0f, 1.0f, 0.0f}
};
static const float bone_octahedral_smooth_normals[6][3] = {
{ 0.0f, -1.0f, 0.0f},
#if 0 /* creates problems for outlines when scaled */
{ 0.943608f * M_SQRT1_2, -0.331048f, 0.943608f * M_SQRT1_2},
{ 0.943608f * M_SQRT1_2, -0.331048f, -0.943608f * M_SQRT1_2},
{-0.943608f * M_SQRT1_2, -0.331048f, -0.943608f * M_SQRT1_2},
{-0.943608f * M_SQRT1_2, -0.331048f, 0.943608f * M_SQRT1_2},
#else
{ M_SQRT1_2, 0.0f, M_SQRT1_2},
{ M_SQRT1_2, 0.0f, -M_SQRT1_2},
{-M_SQRT1_2, 0.0f, -M_SQRT1_2},
{-M_SQRT1_2, 0.0f, M_SQRT1_2},
#endif
{ 0.0f, 1.0f, 0.0f}
};
static const unsigned int bone_octahedral_wire[24] = {
0, 1, 1, 5, 5, 3, 3, 0,
0, 4, 4, 5, 5, 2, 2, 0,
@@ -1561,6 +1577,29 @@ static const unsigned int bone_octahedral_solid_tris[8][3] = {
{5, 4, 1}
};
/**
* Store indices of generated verts from bone_octahedral_solid_tris to define adjacency infos.
* Example: triangle {2, 1, 0} is adjacent to {3, 2, 0}, {1, 4, 0} and {5, 1, 2}.
* {2, 1, 0} becomes {0, 1, 2}
* {3, 2, 0} becomes {3, 4, 5}
* {1, 4, 0} becomes {9, 10, 11}
* {5, 1, 2} becomes {12, 13, 14}
* According to opengl specification it becomes (starting from
* the first vertex of the first face aka. vertex 2):
* {0, 12, 1, 10, 2, 3}
**/
static const unsigned int bone_octahedral_solid_tris_adjacency[8][6] = {
{ 0, 12, 1, 10, 2, 3},
{ 3, 15, 4, 1, 5, 6},
{ 6, 18, 7, 4, 8, 9},
{ 9, 21, 10, 7, 11, 0},
{12, 22, 13, 2, 14, 17},
{15, 13, 16, 5, 17, 20},
{18, 16, 19, 8, 20, 23},
{21, 19, 22, 11, 23, 14},
};
/* aligned with bone_octahedral_solid_tris */
static const float bone_octahedral_solid_normals[8][3] = {
{ M_SQRT1_2, -M_SQRT1_2, 0.00000000f},
@@ -1579,26 +1618,37 @@ Gwn_Batch *DRW_cache_bone_octahedral_get(void)
unsigned int v_idx = 0;
static Gwn_VertFormat format = { 0 };
static struct { uint pos, nor; } attr_id;
static struct { uint pos, nor, snor; } attr_id;
if (format.attrib_ct == 0) {
attr_id.pos = GWN_vertformat_attr_add(&format, "pos", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
attr_id.nor = GWN_vertformat_attr_add(&format, "nor", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
attr_id.snor = GWN_vertformat_attr_add(&format, "snor", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
}
/* Vertices */
Gwn_VertBuf *vbo = GWN_vertbuf_create_with_format(&format);
GWN_vertbuf_data_alloc(vbo, 24);
Gwn_IndexBufBuilder elb;
GWN_indexbuf_init_ex(&elb, GWN_PRIM_TRIS_ADJ, 6 * 8, 24, false);
for (int i = 0; i < 8; i++) {
GWN_vertbuf_attr_set(vbo, attr_id.nor, v_idx, bone_octahedral_solid_normals[i]);
GWN_vertbuf_attr_set(vbo, attr_id.snor, v_idx, bone_octahedral_smooth_normals[bone_octahedral_solid_tris[i][0]]);
GWN_vertbuf_attr_set(vbo, attr_id.pos, v_idx++, bone_octahedral_verts[bone_octahedral_solid_tris[i][0]]);
GWN_vertbuf_attr_set(vbo, attr_id.nor, v_idx, bone_octahedral_solid_normals[i]);
GWN_vertbuf_attr_set(vbo, attr_id.snor, v_idx, bone_octahedral_smooth_normals[bone_octahedral_solid_tris[i][1]]);
GWN_vertbuf_attr_set(vbo, attr_id.pos, v_idx++, bone_octahedral_verts[bone_octahedral_solid_tris[i][1]]);
GWN_vertbuf_attr_set(vbo, attr_id.nor, v_idx, bone_octahedral_solid_normals[i]);
GWN_vertbuf_attr_set(vbo, attr_id.snor, v_idx, bone_octahedral_smooth_normals[bone_octahedral_solid_tris[i][2]]);
GWN_vertbuf_attr_set(vbo, attr_id.pos, v_idx++, bone_octahedral_verts[bone_octahedral_solid_tris[i][2]]);
for (int j = 0; j < 6; ++j) {
GWN_indexbuf_add_generic_vert(&elb, bone_octahedral_solid_tris_adjacency[i][j]);
}
}
SHC.drw_bone_octahedral = GWN_batch_create_ex(GWN_PRIM_TRIS, vbo, NULL, GWN_BATCH_OWNS_VBO);
SHC.drw_bone_octahedral = GWN_batch_create_ex(GWN_PRIM_TRIS_ADJ, vbo, GWN_indexbuf_build(&elb),
GWN_BATCH_OWNS_VBO | GWN_BATCH_OWNS_INDEX);
}
return SHC.drw_bone_octahedral;
}
@@ -1646,6 +1696,17 @@ static const float bone_box_verts[8][3] = {
{-1.0f, 1.0f, 1.0f}
};
static const float bone_box_smooth_normals[8][3] = {
{ M_SQRT3, -M_SQRT3, M_SQRT3},
{ M_SQRT3, -M_SQRT3, -M_SQRT3},
{-M_SQRT3, -M_SQRT3, -M_SQRT3},
{-M_SQRT3, -M_SQRT3, M_SQRT3},
{ M_SQRT3, M_SQRT3, M_SQRT3},
{ M_SQRT3, M_SQRT3, -M_SQRT3},
{-M_SQRT3, M_SQRT3, -M_SQRT3},
{-M_SQRT3, M_SQRT3, M_SQRT3},
};
static const unsigned int bone_box_wire[24] = {
0, 1, 1, 2, 2, 3, 3, 0,
4, 5, 5, 6, 6, 7, 7, 4,
@@ -1680,7 +1741,31 @@ static const unsigned int bone_box_solid_tris[12][3] = {
{4, 6, 7},
};
/* aligned with bone_octahedral_solid_tris */
/**
* Store indices of generated verts from bone_box_solid_tris to define adjacency infos.
* See bone_octahedral_solid_tris for more infos.
**/
static const unsigned int bone_box_solid_tris_adjacency[12][6] = {
{ 0, 8, 1, 14, 2, 5},
{ 3, 1, 4, 20, 5, 26},
{ 6, 2, 7, 16, 8, 11},
{ 9, 7, 10, 32, 11, 24},
{12, 0, 13, 22, 14, 17},
{15, 13, 16, 30, 17, 6},
{18, 3, 19, 28, 20, 23},
{21, 19, 22, 33, 23, 12},
{24, 4, 25, 10, 26, 29},
{27, 25, 28, 34, 29, 18},
{30, 9, 31, 15, 32, 35},
{33, 31, 34, 21, 35, 27},
};
/* aligned with bone_box_solid_tris */
static const float bone_box_solid_normals[12][3] = {
{ 0.0f, -1.0f, 0.0f},
{ 0.0f, -1.0f, 0.0f},
@@ -1707,24 +1792,33 @@ Gwn_Batch *DRW_cache_bone_box_get(void)
unsigned int v_idx = 0;
static Gwn_VertFormat format = { 0 };
static struct { uint pos, nor; } attr_id;
static struct { uint pos, nor, snor; } attr_id;
if (format.attrib_ct == 0) {
attr_id.pos = GWN_vertformat_attr_add(&format, "pos", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
attr_id.nor = GWN_vertformat_attr_add(&format, "nor", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
attr_id.snor = GWN_vertformat_attr_add(&format, "snor", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
}
/* Vertices */
Gwn_VertBuf *vbo = GWN_vertbuf_create_with_format(&format);
GWN_vertbuf_data_alloc(vbo, 36);
Gwn_IndexBufBuilder elb;
GWN_indexbuf_init_ex(&elb, GWN_PRIM_TRIS_ADJ, 6 * 12, 36, false);
for (int i = 0; i < 12; i++) {
for (int j = 0; j < 3; j++) {
GWN_vertbuf_attr_set(vbo, attr_id.nor, v_idx, bone_box_solid_normals[i]);
GWN_vertbuf_attr_set(vbo, attr_id.snor, v_idx, bone_box_smooth_normals[bone_box_solid_tris[i][j]]);
GWN_vertbuf_attr_set(vbo, attr_id.pos, v_idx++, bone_box_verts[bone_box_solid_tris[i][j]]);
}
for (int j = 0; j < 6; ++j) {
GWN_indexbuf_add_generic_vert(&elb, bone_box_solid_tris_adjacency[i][j]);
}
}
SHC.drw_bone_box = GWN_batch_create_ex(GWN_PRIM_TRIS, vbo, NULL, GWN_BATCH_OWNS_VBO);
SHC.drw_bone_box = GWN_batch_create_ex(GWN_PRIM_TRIS_ADJ, vbo, GWN_indexbuf_build(&elb),
GWN_BATCH_OWNS_VBO | GWN_BATCH_OWNS_INDEX);
}
return SHC.drw_bone_box;
}