X-Git-Url: https://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=texturefrag.glsl;h=ddd951ed11975ef3aec4ee3fbe46989004baed1c;hp=2a3de5508c2aa078cb47eb2220133581949c80c9;hb=c0811ee866ca2b6d002c15394ea5d4b7a1067a80;hpb=8abaf8f77191e1c660def0832d8036a8b4639ba8

diff --git a/texturefrag.glsl b/texturefrag.glsl
index 2a3de55..ddd951e 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);
 }
 
@@ -47,15 +56,21 @@ void main() {
 	if (!material.hasNormalMap)
 		normal = defNormal;
 
+	vec4 ambient = material.ambient * texture(material.diffuseMap, texCoord);
+	if (!material.hasTexture)
+		ambient = material.ambient;
+
+	ambient = mix(ambient, reflection(), material.reflectivity);
+	ambient = mix(ambient, refraction(), 1 - material.opacity);
+
 	vec3 lightDir = normalize(lightPos - fragPos);
 	
 	vec4 diffTex = texture(material.diffuseMap, texCoord);
 	if (!material.hasTexture)
 		diffTex = material.diffuse;
 	
-	diffTex = mix(diffTex, reflection(worldNormal), material.reflectivity);
-	
-	vec4 ambient = material.ambient * diffTex;
+	diffTex = mix(diffTex, reflection(), material.reflectivity);
+	diffTex = mix(diffTex, refraction(), 1 - material.opacity);
 	
 	vec4 diffuse = max(0, dot(lightDir, normal)) * diffTex;
 
@@ -69,6 +84,5 @@ void main() {
 	vec4 specular = pow(max(0, dot(viewDir, reflectDir)), material.shininess) * specTex;
 
 	FragColor = (ambient + diffuse + specular) * lightColor;
-
 }