okseby/Quake-III-Arena
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

OpenGL2: Add GPU vertex skinning for IQM models

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

17
code/renderergl2/glsl/lightall_vp.glsl
View file

@ -12,6 +12,9 @@ attribute vec4 attr_Tangent;
attribute vec3 attr_Position2;
attribute vec3 attr_Normal2;
attribute vec4 attr_Tangent2;
#elif defined(USE_BONE_ANIMATION)
attribute vec4 attr_BoneIndexes;
attribute vec4 attr_BoneWeights;
#endif
#if defined(USE_LIGHT) && !defined(USE_LIGHT_VECTOR)
@ -48,6 +51,8 @@ uniform mat4 u_ModelMatrix;
#if defined(USE_VERTEX_ANIMATION)
uniform float u_VertexLerp;
#elif defined(USE_BONE_ANIMATION)
uniform mat4 u_BoneMatrix[MAX_GLSL_BONES];
#endif
#if defined(USE_LIGHT_VECTOR)
@ -151,6 +156,18 @@ void main()
#if defined(USE_LIGHT) && !defined(USE_FAST_LIGHT)
vec3 tangent = mix(attr_Tangent.xyz, attr_Tangent2.xyz, u_VertexLerp);
#endif
#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);
#if defined(USE_LIGHT) && !defined(USE_FAST_LIGHT)
vec3 tangent = normalize(nrmMat * attr_Tangent.xyz);
#endif
#else
vec3 position = attr_Position;
vec3 normal = attr_Normal;