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Fully implemented lighting

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Two types of light sources are currently supported: directional lights
and point lights. A scene can have only one directional light and up to
1024 point lights.
This commit is contained in:
Lorenzo Torres 2025-08-08 03:18:08 +02:00
parent 214317e0bf
commit 503ed33aec
7 changed files with 181 additions and 48 deletions
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83
assets/shaders/shader.frag
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@ -1,39 +1,80 @@
#version 450
#define MAX_POINT_LIGHTS 1024
layout(location = 0) out vec4 outColor;
layout(location = 2) in vec3 Normal;
layout(location = 3) in vec3 FragPos;
layout(location = 4) in vec2 TexCoords;
layout (binding = 2) uniform LightUniform {
vec3 pos;
} lightPos;
layout (binding = 2) uniform DirectionalLight {
vec3 direction;
vec3 ambient;
vec3 diffuse;
vec3 specular;
} directional_light;
layout (binding = 5) uniform PointLight {
vec3 position;
vec3 ambient;
vec3 diffuse;
vec3 specular;
vec3 data;
} point_lights[MAX_POINT_LIGHTS];
layout (binding = 3) uniform ViewUniform {
vec3 pos;
} viewPos;
layout(push_constant) uniform pc {
int light_count;
} pushConstants;
layout (set = 1, binding = 0) uniform sampler2D textureSampler;
layout (set = 1, binding = 1) uniform sampler2D diffuseSampler;
void main() {
vec3 lightDiffuse = vec3(0.5, 0.5, 0.5);
vec3 lightAmbient = vec3(0.2, 0.2, 0.2);
vec3 lightSpecular = vec3(1.0, 1.0, 1.0);
vec3 norm = normalize(Normal);
vec3 lightDir = normalize(lightPos.pos - FragPos);
float diff = max(dot(norm, lightDir), 0.0);
vec3 diffuse = lightDiffuse * diff * vec3(texture(textureSampler, TexCoords));
vec3 ambient = lightAmbient * vec3(texture(textureSampler, TexCoords));
vec3 viewDir = normalize(viewPos.pos - FragPos);
vec3 reflectDir = reflect(-lightDir, norm);
vec3 calc_directional_light(vec3 normal, vec3 viewDir) {
vec3 lightDir = normalize(-directional_light.direction);
float diff = max(dot(normal, lightDir), 0.0);
vec3 reflectDir = reflect(-lightDir, normal);
float spec = pow(max(dot(viewDir, reflectDir), 0.0), 2);
vec3 specular = lightSpecular * spec * vec3(texture(diffuseSampler, TexCoords));
//vec3 specular = lightSpecular * spec * vec3(1.0, 1.0, 1.0);
vec3 result = (ambient + diffuse + specular);
outColor = vec4(result, 1.0);
vec3 ambient = directional_light.ambient * vec3(texture(textureSampler, TexCoords));
vec3 diffuse = directional_light.diffuse * diff * vec3(texture(textureSampler , TexCoords));
vec3 specular = directional_light.specular * spec * vec3(texture(diffuseSampler, TexCoords));
return (ambient + diffuse + specular);
}
vec3 calc_point_light(int index, vec3 normal, vec3 fragPos, vec3 viewDir) {
float constant = point_lights[index].data[0];
float linear = point_lights[index].data[1];
float quadratic = point_lights[index].data[2];
vec3 lightDir = normalize(point_lights[index].position - fragPos);
float diff = max(dot(normal, lightDir), 0.0);
vec3 reflectDir = reflect(-lightDir, normal);
float spec = pow(max(dot(viewDir, reflectDir), 0.0), 2);
float distance = length(point_lights[index].position - fragPos);
float attenuation = 1.0 / (constant + linear * distance + quadratic * (distance * distance));
vec3 ambient = point_lights[index].ambient * vec3(texture(textureSampler, TexCoords));
vec3 diffuse = point_lights[index].diffuse * diff * vec3(texture(textureSampler, TexCoords));
vec3 specular = point_lights[index].specular * spec * vec3(texture(diffuseSampler, TexCoords));
ambient *= attenuation;
diffuse *= attenuation;
specular *= attenuation;
return (ambient + diffuse + specular);
}
void main() {
vec3 norm = normalize(Normal);
vec3 viewDir = normalize(viewPos.pos - FragPos);
vec3 result = calc_directional_light(norm, viewDir);
for(int i = 0; i < pushConstants.light_count; i++)
result += calc_point_light(i, norm, FragPos, viewDir);
outColor = vec4(result, 1.0);
}