Add specular and normal mapping

[opengl.git] / texturevertex.glsl

diff --git a/texturevertex.glsl b/texturevertex.glsl
new file mode 100644 (file)
index 0000000..d8c97f4
--- /dev/null
+++ b/texturevertex.glsl
@@ -0,0 +1,61 @@
+#version 330
+in vec3 vPosition;
+in vec4 vColor;
+in vec3 vNormal;
+in vec3 tangent;
+in vec3 bitangent;
+in vec2 vTexCoord;
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+out vec3 defNormal;
+out vec2 texCoord;
+
+uniform vec3 vLightPos;
+uniform vec3 vViewPos;
+
+out vec3 lightPos;
+out vec3 viewPos;
+out vec3 fragPos;
+
+struct Material {
+       vec3 ambient;
+       vec3 diffuse;
+       sampler2D diffuseMap;
+       vec3 specular;
+       sampler2D specularMap;
+       float shininess;
+       
+       bool hasTexture;
+       bool hasSpecularMap;
+
+       sampler2D normalMap;
+       bool hasNormalMap;
+};
+
+uniform Material material;
+
+
+void main() {
+       vec4 pos = model * vec4(vPosition, 1.f);
+       defNormal = mat3(transpose(inverse(model))) * vNormal;
+       texCoord = vTexCoord;
+
+       //tangent space stuff
+       if (material.hasNormalMap) {
+               vec3 T = normalize(vec3(model * vec4(tangent,   0.0)));
+               vec3 B = normalize(vec3(model * vec4(bitangent, 0.0)));
+               vec3 N = normalize(vec3(model * vec4(vNormal,    0.0)));
+               // convert TBN to world->tangent space
+               mat3 TBN = transpose(mat3(T, B, N));
+               lightPos = TBN * vLightPos;
+               viewPos = TBN * vViewPos;
+               fragPos = TBN * vec3(pos);
+       } else {
+               lightPos = vLightPos;
+               viewPos = vViewPos;
+               fragPos = vec3(pos);
+       }
+       
+       gl_Position = projection * view * pos;
+}