diff options
Diffstat (limited to 'src/extras/shaders/gl3/normaldiffusemap.vert')
-rw-r--r-- | src/extras/shaders/gl3/normaldiffusemap.vert | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/extras/shaders/gl3/normaldiffusemap.vert b/src/extras/shaders/gl3/normaldiffusemap.vert new file mode 100644 index 000000000..306a562fb --- /dev/null +++ b/src/extras/shaders/gl3/normaldiffusemap.vert @@ -0,0 +1,39 @@ +#version 150 core + +in vec3 vertexPosition; +in vec3 vertexNormal; +in vec2 vertexTexCoord; +in vec4 vertexTangent; + +out vec3 worldPosition; +out vec2 texCoord; +out mat3 tangentMatrix; + +uniform mat4 modelMatrix; +uniform mat3 modelNormalMatrix; +uniform mat4 mvp; + +uniform float texCoordScale; + +void main() +{ + // Pass through texture coordinates + texCoord = vertexTexCoord * texCoordScale; + + // Transform position, normal, and tangent to world coords + vec3 normal = normalize( modelNormalMatrix * vertexNormal ); + vec3 tangent = normalize( modelNormalMatrix * vertexTangent.xyz ); + worldPosition = vec3( modelMatrix * vec4( vertexPosition, 1.0 ) ); + + // Calculate binormal vector + vec3 binormal = normalize( cross( normal, tangent ) ); + + // Construct matrix to transform from eye coords to tangent space + tangentMatrix = mat3 ( + tangent.x, binormal.x, normal.x, + tangent.y, binormal.y, normal.y, + tangent.z, binormal.z, normal.z ); + + // Calculate vertex position in clip coordinates + gl_Position = mvp * vec4( vertexPosition, 1.0 ); +} |