X-Git-Url: https://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=texturefrag.glsl;h=ddd951ed11975ef3aec4ee3fbe46989004baed1c;hp=94bda7fa859231016a526ff3fd5f7af405ee7b43;hb=c0811ee866ca2b6d002c15394ea5d4b7a1067a80;hpb=85f8f7278f24fe73fef1a19174376b155319072f

diff --git a/texturefrag.glsl b/texturefrag.glsl
index 94bda7f..ddd951e 100644
--- a/texturefrag.glsl
+++ b/texturefrag.glsl
@@ -8,6 +8,10 @@ struct Material {
 	sampler2D specularMap;
 	float shininess;
 
+	float reflectivity;
+	float refractiveIndex;
+	float opacity;
+	
 	bool hasTexture;
 	bool hasSpecularMap;
 
@@ -15,7 +19,7 @@ struct Material {
 	bool hasNormalMap;
 };
 
-in vec3 defNormal;
+in vec3 defNormal, worldNormal;
 in vec2 texCoord;
 
 // These are all in tangent space
@@ -23,47 +27,62 @@ in vec3 lightPos;
 in vec3 viewPos;
 in vec3 fragPos;
 
+in vec3 worldViewPos, worldFragPos;
+
 uniform vec4 lightColor;
 
 uniform Material material;
 
+uniform samplerCube skybox;
+
 out vec4 FragColor;
 
-void main() {
+vec4 reflection() {
+	vec3 I = normalize(worldFragPos - worldViewPos);
+	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);
+}
 
-	vec3 normal;
-	if (material.hasNormalMap) {
-		normal = texture(material.normalMap, texCoord).rgb;
+void main() {
+	vec3 normal = texture(material.normalMap, texCoord).rgb;
 	normal = normalize(normal * 2 - 1);
-	} else {
+	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;
-	if (material.hasTexture)
-		diffTex = texture(material.diffuseMap, texCoord);
-	else
-		diffTex = vec4(1);
+	vec4 diffTex = texture(material.diffuseMap, texCoord);
+	if (!material.hasTexture)
+		diffTex = material.diffuse;
 	
-	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)) * material.diffuse * diffTex;
+	vec4 diffuse = max(0, dot(lightDir, normal)) * diffTex;
 
 	vec3 viewDir = normalize(viewPos - fragPos);
 	vec3 reflectDir = reflect(-lightDir, normal);
 
-	vec4 specTex;
-	if (material.hasSpecularMap)
-		specTex = texture(material.specularMap, texCoord);
-	else
-		specTex = vec4(1);
-
-	vec4 specular = pow(max(0, dot(viewDir, reflectDir)), material.shininess) * material.specular * specTex;
+	vec4 specTex = texture(material.specularMap, texCoord);
+	if (!material.hasSpecularMap)
+		specTex = material.specular;
 
-	vec4 lighting = (ambient + diffuse + specular) * lightColor;
+	vec4 specular = pow(max(0, dot(viewDir, reflectDir)), material.shininess) * specTex;
 
-	FragColor = lighting;
+	FragColor = (ambient + diffuse + specular) * lightColor;
 }