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OpenGL2: Add GPU vertex skinning for IQM models

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Using GPU vertex skinning is significantly faster than CPU vertex
skinning. Especially since OpenGL2 has to run R_VaoPackNormal() and
R_VaoPackTangent() each vertex each frame which causes CPU vertex
skinning to be significantly slower than OpenGL1 renderer.
This commit is contained in:
Zack Middleton 2018-07-27 17:40:25 -05:00
parent cccd283be8
commit 11337c9fa2
10 changed files with 533 additions and 34 deletions
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27
code/renderergl2/glsl/shadowfill_vp.glsl
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@ -2,10 +2,13 @@ attribute vec3 attr_Position;
attribute vec3 attr_Normal;
attribute vec4 attr_TexCoord0;
//#if defined(USE_VERTEX_ANIMATION)
#if defined(USE_VERTEX_ANIMATION)
attribute vec3 attr_Position2;
attribute vec3 attr_Normal2;
//#endif
#elif defined(USE_BONE_ANIMATION)
attribute vec4 attr_BoneIndexes;
attribute vec4 attr_BoneWeights;
#endif
//#if defined(USE_DEFORM_VERTEXES)
uniform int u_DeformGen;
@ -17,9 +20,11 @@ uniform mat4 u_ModelViewProjectionMatrix;
uniform mat4 u_ModelMatrix;
//#if defined(USE_VERTEX_ANIMATION)
#if defined(USE_VERTEX_ANIMATION)
uniform float u_VertexLerp;
//#endif
#elif defined(USE_BONE_ANIMATION)
uniform mat4 u_BoneMatrix[MAX_GLSL_BONES];
#endif
varying vec3 var_Position;
@ -78,8 +83,22 @@ vec3 DeformPosition(const vec3 pos, const vec3 normal, const vec2 st)
void main()
{
#if defined(USE_VERTEX_ANIMATION)
vec3 position = mix(attr_Position, attr_Position2, u_VertexLerp);
vec3 normal = mix(attr_Normal, attr_Normal2, u_VertexLerp);
#elif defined(USE_BONE_ANIMATION)
mat4 vtxMat = u_BoneMatrix[int(attr_BoneIndexes.x)] * attr_BoneWeights.x;
vtxMat += u_BoneMatrix[int(attr_BoneIndexes.y)] * attr_BoneWeights.y;
vtxMat += u_BoneMatrix[int(attr_BoneIndexes.z)] * attr_BoneWeights.z;
vtxMat += u_BoneMatrix[int(attr_BoneIndexes.w)] * attr_BoneWeights.w;
mat3 nrmMat = mat3(cross(vtxMat[1].xyz, vtxMat[2].xyz), cross(vtxMat[2].xyz, vtxMat[0].xyz), cross(vtxMat[0].xyz, vtxMat[1].xyz));
vec3 position = vec3(vtxMat * vec4(attr_Position, 1.0));
vec3 normal = normalize(nrmMat * attr_Normal);
#else
vec3 position = attr_Position;
vec3 normal = attr_Normal;
#endif
position = DeformPosition(position, normal, attr_TexCoord0.st);