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| #version 410 core | ||
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| // Inputs from vertex shader | ||
| in vec3 FragPos; // Position in world space | ||
| in vec3 Normal; // Normal in world space | ||
| in vec3 ViewDir; // View direction | ||
| in vec3 textCoords; //Texture | ||
| in vec3 Tangent; //Tangent | ||
| in vec3 Bitangent; //Bitangent | ||
| // Uniforms | ||
| uniform vec3 light_position; | ||
| uniform vec3 diffuse_colour; | ||
| uniform vec3 specular_colour; | ||
| uniform vec3 ambient_colour; | ||
| uniform float shininess_value; | ||
| uniform bool use_normal_mapping; | ||
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| uniform sampler2D demo_diffuse_texture; | ||
| uniform sampler2D demo_specular_texture; | ||
| uniform sampler2D demo_normal_texture; | ||
| // Output color | ||
| out vec4 FragColor; | ||
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| void main() | ||
| { | ||
| vec3 ambient = ambient_colour; | ||
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| if(use_normal_mapping){ | ||
| vec3 T = normalize(Tangent); | ||
| vec3 B = normalize(Bitangent); | ||
| vec3 N = normalize(Normal); | ||
| mat3 TBN = mat3(T, B, N); | ||
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| vec3 normalMap = texture(demo_normal_texture, textCoords.xy).rgb; | ||
| normalMap = normalize(normalMap * 2.0 - 1.0); | ||
| vec3 normal = normalize(TBN * normalMap); | ||
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| vec3 light_dir = normalize(light_position - FragPos); // Light direction | ||
| float diff = max(dot(normal, light_dir), 0.0); // Angle between light and normal | ||
| vec3 diffuse = diff * texture(demo_diffuse_texture, textCoords.xy).rgb; | ||
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| // Specular lighting (Phong reflectance) | ||
| vec3 reflect_dir = reflect(-light_dir, normal); // Reflect the light direction around the normal | ||
| float spec = pow(max(dot(ViewDir, reflect_dir), 0.0), shininess_value); // Specular intensity | ||
| vec3 specular = spec * texture(demo_specular_texture, textCoords.xy).rgb; | ||
| // Combine all three components (ambient + diffuse + specular) | ||
| vec3 result = (ambient + diffuse + specular); | ||
| FragColor = vec4(result, 1.0); | ||
| } else | ||
| { | ||
| vec3 normal = normalize(Normal); | ||
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| vec3 light_dir = normalize(light_position - FragPos); // Light direction | ||
| float diff = max(dot(normal, light_dir), 0.0); // Angle between light and normal | ||
| vec3 diffuse = diff * texture(demo_diffuse_texture, textCoords.xy).rgb; | ||
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| // Specular lighting (Phong reflectance) | ||
| vec3 reflect_dir = reflect(-light_dir, normal); // Reflect the light direction around the normal | ||
| float spec = pow(max(dot(ViewDir, reflect_dir), 0.0), shininess_value); // Specular intensity | ||
| vec3 specular = spec * texture(demo_specular_texture, textCoords.xy).rgb; | ||
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| // Combine all three components (ambient + diffuse + specular) | ||
| vec3 result = (ambient + diffuse + specular); | ||
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| // Output the final color (with alpha value of 1.0) | ||
| FragColor = vec4(result, 1.0); | ||
| } | ||
| } |
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| @@ -0,0 +1,41 @@ | ||
| #version 410 core | ||
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| // Vertex attributes | ||
| layout (location = 0) in vec3 position; | ||
| layout (location = 1) in vec3 normal; | ||
| layout (location = 2) in vec3 textures; | ||
| layout (location = 3) in vec3 tangent; | ||
| layout (location = 4) in vec3 bitangent; | ||
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| // Uniforms | ||
| uniform mat4 normal_model_to_world; | ||
| uniform mat4 vertex_model_to_world; | ||
| uniform mat4 vertex_world_to_clip; | ||
| uniform vec3 camera_position; // Camera position (for specular reflections) | ||
| // Outputs to fragment shader | ||
| out vec3 FragPos; // Position in world space | ||
| out vec3 Normal; // Normal in world space | ||
| out vec3 ViewDir; // View direction (camera position - fragment position) | ||
| out vec3 textCoords; | ||
| out vec3 Tangent; | ||
| out vec3 Bitangent; | ||
| void main() | ||
| { | ||
| // Transform the vertex position to world space | ||
| FragPos = vec3(vertex_model_to_world * vec4(position, 1.0)); | ||
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| // Pass the normal in world space | ||
| Normal = (normal_model_to_world * vec4(normal, 0.0)).xyz; | ||
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| Tangent = (normal_model_to_world * vec4(tangent, 0.0)).xyz; | ||
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| Bitangent = (normal_model_to_world * vec4(bitangent, 0.0)).xyz; | ||
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| // Calculate view direction (camera position - fragment position) | ||
| ViewDir = normalize(camera_position - FragPos); | ||
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| textCoords = textures; | ||
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| // Transform the position to clip space for rasterization | ||
| gl_Position = vertex_world_to_clip * vec4(FragPos, 1.0); | ||
| } |
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