45 lines
1.2 KiB
GLSL
45 lines
1.2 KiB
GLSL
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#version 460 core
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in vec2 v_texcoord;
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in vec3 v_normal;
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in vec3 v_position;
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layout (binding = 1, std140) uniform Light {
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uniform vec4 light_color;
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uniform vec3 light_pos;
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uniform vec3 camera_pos;
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};
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uniform sampler2D u_texture;
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out vec4 f_color;
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vec4 pointLight() {
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vec3 light_vector = light_pos - v_position;
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float dist = length(light_vector);
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float a = 1.0;
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float b = 0.7;
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float intensity = 1 / (a * dist * dist + b * dist + 1.0f);
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// ambient lighting
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float ambient = 0.2;
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// diffuse lighting
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float diffuse_light = 0.7;
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vec3 normal = normalize(v_normal);
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vec3 light_direction = normalize(light_vector);
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float diffuse = diffuse_light * max(dot(normal, light_direction), 0);
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// specular lighting
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float specular_light = 0.7;
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vec3 view_direction = normalize(camera_pos - v_position);
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vec3 reflection_direction = reflect(-light_direction, normal);
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vec3 halfway_vec = normalize(view_direction + light_direction);
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float specular = specular_light * pow(max(dot(normal, halfway_vec), 0), 100);
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return (texture(u_texture, v_texcoord) * (diffuse * intensity + ambient) + specular * intensity) * light_color;
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}
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void main() {
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f_color = pointLight();
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}
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