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79 lines
2.1 KiB
79 lines
2.1 KiB
2 months ago
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#version 450 core
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layout(location = 0) out vec4 color;
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in vec4 v_color;
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in vec2 v_textureCoordinates;
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in flat uint v_textureIndex;
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uniform sampler2D u_textures[32];
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// -----------------------------------------
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layout(std140, binding = 0) uniform Camera {
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mat4 u_projectionView;
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vec3 u_position;
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};
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// -----------------------------------------
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struct DirectionalLight {
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vec3 direction;
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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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const int MAX_DIRECTIONAL_LIGHTS = 32;
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layout(std140, binding = 1) uniform DirectionalLights {
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DirectionalLight u_directionalLight[MAX_DIRECTIONAL_LIGHTS];
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};
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// -----------------------------------------
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void main()
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{
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float isObject = texture(u_textures[v_textureIndex + 1], v_textureCoordinates).a;
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if (isObject == 0.0f) {
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color = vec4(0,0,0,0);
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return;
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}
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vec3 albedo = texture(u_textures[v_textureIndex + 0], v_textureCoordinates).rgb;
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float specular = texture(u_textures[v_textureIndex + 0], v_textureCoordinates).a;
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vec3 position = texture(u_textures[v_textureIndex + 1], v_textureCoordinates).rgb;
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vec3 normal = texture(u_textures[v_textureIndex + 2], v_textureCoordinates).rgb;
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vec3 lighting = vec3(0.0f, 0.0f, 0.0f);//albedo * v_color.xyz;
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vec3 viewDirection = normalize(u_position - position);
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// Loop through all directional lights
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for (int i = 0; i < MAX_DIRECTIONAL_LIGHTS; ++i) {
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// Diffuse
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vec3 lightDirection = normalize(-u_directionalLight[i].direction);
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float diffuse = max(dot(normal, lightDirection), 0.0f);
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// Specular
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vec3 reflectionDirection = reflect(-lightDirection, normal);
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float specular = pow(max(dot(viewDirection, reflectionDirection), 0.0f), 32);
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lighting +=
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(albedo * u_directionalLight[i].ambient) +
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(albedo * diffuse * u_directionalLight[i].diffuse) +
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(specular * u_directionalLight[i].specular);
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}
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// Loop through all point lights
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// TODO
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// vec3 lightDirection = normalize(lightPosition - position);
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// float diffuse = max(dot(normal, lightDirection), 0.0f);
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// lighting += diffuse * albedo * u_lightColor;
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// Loop through all spot lights
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// TODO
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color = vec4(lighting, 1.0f);
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}
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