Implemented basic materials in to the fragment shader..
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39
shader.fs
39
shader.fs
@ -4,9 +4,25 @@ out vec4 FragColor;
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in vec3 Normal;
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in vec3 FragPos;
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uniform vec3 objectColor;
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uniform vec3 lightColor;
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uniform vec3 lightPos;
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struct Material {
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vec3 ambient;
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vec3 diffuse;
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vec3 specular;
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float shininess;
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};
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struct Light{
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vec3 position;
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vec3 ambient;
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vec3 diffuse;
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vec3 specular;
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};
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uniform Light light;
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uniform Material material;
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uniform vec3 viewPos;
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@ -14,28 +30,25 @@ uniform vec3 viewPos;
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void main()
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{
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// ambient lighting calculation
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float ambientStrength = 0.1;
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vec3 ambient = ambientStrength * lightColor;
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vec3 ambient = light.ambient * material.ambient;
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// diffuse lighting calculation
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vec3 norm = normalize(Normal);
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vec3 lightDir = normalize(lightPos - FragPos);
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vec3 lightDir = normalize(light.position - FragPos);
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float diff = max(dot(norm, lightDir), 0.0);
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vec3 diffuse = diff * lightColor;
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vec3 diffuse = light.diffuse * ( diff * material.diffuse);
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// specular lighting
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float specularStrength = 0.5;
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float shininess = 32;
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// specular lighting
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vec3 viewDir = normalize(viewPos - FragPos);
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vec3 reflectDir = reflect(-lightDir, norm);
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), shininess);
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vec3 specular = specularStrength * spec * lightColor;
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
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vec3 specular = light.specular * ( spec * material.specular);
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// Calculate the result;
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vec3 result = (ambient + diffuse + specular) * objectColor;
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vec3 result = ambient + diffuse + specular ;
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FragColor = vec4(result, 1.0);
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}
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28
src/main.cpp
28
src/main.cpp
@ -196,9 +196,31 @@ while(!glfwWindowShouldClose(window))
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// draw cubes
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shader.use();
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shader.setVec3("objectColor", glm::vec3( 1.0f, 0.5, 0.31f));
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shader.setVec3("lightColor",glm::vec3( 1.0f, 1.0f, 1.0f));
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shader.setVec3("lightPos", lightpos);
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shader.setVec3("material.ambient", glm::vec3(1.0f, 0.5f, 0.31f));
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shader.setVec3("material.diffuse", glm::vec3(1.0f, 0.5f, 0.31f));
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shader.setVec3("material.specular", glm::vec3(0.5, 0.5f, 0.5f));
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shader.setFloat("material.shininess", 32.0f);
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glm::vec3 lightColor;
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lightColor.x = sin(glfwGetTime() * 2.0f);
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lightColor.y = sin(glfwGetTime() * 0.7f);
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lightColor.z = sin(glfwGetTime() * 1.3f);
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glm::vec3 diffuseColor = lightColor * glm::vec3(0.5f);
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glm::vec3 ambientColor = diffuseColor * glm::vec3(0.2f);
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shader.setVec3("light.position", lightpos);
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shader.setVec3("light.ambient", ambientColor);
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shader.setVec3("light.diffuse", diffuseColor);
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shader.setVec3("light.specular", glm::vec3(1.0f, 1.0f, 1.0f));
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shader.setVec3("viewPos", camera.Position);
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shader.setMat4("view", view);
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