mirror of
https://github.com/nunuhara/xsystem4.git
synced 2026-09-29 18:38:04 +03:00
kichikuou
9b03741288
Before this, the BoneTransforms uniform block consumed (4 * 4 * sizeof(float) * MAX_BONES) = 19712 bytes, which exceeds 16384, the minimum possible value of GL_MAX_UNIFORM_BLOCK_SIZE in OpenGL ES 3.2. Since the bone matrices are affine, we can drop the 4th rows and pack them into a mat4x3 array. Now the BoneTransforms block is 14784 bytes and it should work with all OpenGL ES 3.2 implementations.
49 lines
1.5 KiB
GLSL
49 lines
1.5 KiB
GLSL
/* Copyright (C) 2022 kichikuou <KichikuouChrome@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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, see <http://gnu.org/licenses/>.
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*/
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uniform mat4 local_transform;
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uniform mat4 view_transform;
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const int MAX_BONES = 308; // see 3d_internal.h
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const int NR_WEIGHTS = 4;
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uniform bool has_bones;
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layout(std140, row_major) uniform BoneTransforms {
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mat4x3 bone_matrices[MAX_BONES];
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};
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in vec3 vertex_pos;
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in ivec4 vertex_bone_index;
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in vec4 vertex_bone_weight;
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void main() {
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mat4 local_bone_transform = local_transform;
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if (has_bones) {
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mat4x3 bone_transform = mat4x3(0.0);
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for (int i = 0; i < NR_WEIGHTS; i++) {
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if (vertex_bone_index[i] >= 0) {
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bone_transform += bone_matrices[vertex_bone_index[i]] * vertex_bone_weight[i];
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}
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}
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local_bone_transform *= mat4(
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vec4(bone_transform[0], 0.0),
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vec4(bone_transform[1], 0.0),
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vec4(bone_transform[2], 0.0),
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vec4(bone_transform[3], 1.0));
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}
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gl_Position = view_transform * local_bone_transform * vec4(vertex_pos, 1.0);
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}
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