mirror of
https://github.com/nunuhara/xsystem4.git
synced 2026-10-08 14:58:14 +03:00
kichikuou
e00ba69546
This fixes https://github.com/kichikuou/xsystem4-android/issues/14. There appears to be a bug in the OpenGL ES implementation for PowerVR that prevents row_major mat4x3 uniforms from loading correctly. This changes bone_matrices from row_major mat4x3 to column_major mat3x4 and transposes them manually in the vertex shaders. (Column major mat4x3 cannot be used due to the UBO size limitation)
49 lines
1.7 KiB
GLSL
49 lines
1.7 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) uniform BoneTransforms {
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mat3x4 bone_matrices[MAX_BONES]; // transposed
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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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mat3x4 bone_transform = mat3x4(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].x, bone_transform[1].x, bone_transform[2].x, 0.0),
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vec4(bone_transform[0].y, bone_transform[1].y, bone_transform[2].y, 0.0),
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vec4(bone_transform[0].z, bone_transform[1].z, bone_transform[2].z, 0.0),
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vec4(bone_transform[0].w, bone_transform[1].w, bone_transform[2].w, 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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