X-Git-Url: http://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=texturefrag.glsl;h=24a54d56ea686420c083bf906976daae8991deed;hp=2a3de5508c2aa078cb47eb2220133581949c80c9;hb=3f58e3a13899a1b28ee7be6c0bf835670957aa6a;hpb=8abaf8f77191e1c660def0832d8036a8b4639ba8

diff --git a/texturefrag.glsl b/texturefrag.glsl
index 2a3de55..24a54d5 100644
--- a/texturefrag.glsl
+++ b/texturefrag.glsl
@@ -9,6 +9,8 @@ struct Material {
 	float shininess;
 
 	float reflectivity;
+	float refractiveIndex;
+	float opacity;
 	
 	bool hasTexture;
 	bool hasSpecularMap;
@@ -35,9 +37,16 @@ uniform samplerCube skybox;
 
 out vec4 FragColor;
 
-vec4 reflection(vec3 normal) {
+vec4 reflection() {
 	vec3 I = normalize(worldFragPos - worldViewPos);
-	vec3 R = reflect(I, normalize(normal));
+	vec3 R = reflect(I, normalize(worldNormal));
+	return vec4(texture(skybox, R).rgb, 1);
+}
+
+vec4 refraction() {
+	float ratio = 1.f / material.refractiveIndex;
+	vec3 I = normalize(worldFragPos - worldViewPos);
+	vec3 R = refract(I, normalize(worldNormal), ratio);
 	return vec4(texture(skybox, R).rgb, 1);
 }
 
@@ -53,7 +62,9 @@ void main() {
 	if (!material.hasTexture)
 		diffTex = material.diffuse;
 	
-	diffTex = mix(diffTex, reflection(worldNormal), material.reflectivity);
+	diffTex = mix(diffTex, reflection(), material.reflectivity);
+	
+	diffTex = mix(diffTex, refraction(), 1 - material.opacity);
 	
 	vec4 ambient = material.ambient * diffTex;