mirror of
https://github.com/cyberarm/i-mic-fps.git
synced 2025-12-15 15:42:35 +00:00
89 lines
2.5 KiB
GLSL
89 lines
2.5 KiB
GLSL
# version 330 core
|
|
|
|
@include "light_struct"
|
|
|
|
in vec3 outPosition;
|
|
in vec3 outColor;
|
|
in vec4 outNormal;
|
|
in vec3 outUV;
|
|
in float outTextureID;
|
|
in Light outLights[MAX_LIGHTS];
|
|
in float outTotalLights;
|
|
in vec3 outFragPos;
|
|
in vec3 outCameraPos;
|
|
in vec3 outInverseNormal;
|
|
in float outDisableLighting;
|
|
|
|
// optimizing compilers are annoying at this stage of my understanding of GLSL
|
|
vec4 lokiVar;
|
|
|
|
// https://learnopengl.com/Lighting/Multiple-lights
|
|
vec3 calculatePointLight(Light light) {
|
|
vec3 viewDir = normalize(outCameraPos - outFragPos);
|
|
vec3 lightDir = normalize(light.position - outFragPos);
|
|
float diff = max(dot(vec3(outNormal), lightDir), 0.0);
|
|
vec3 reflectDir = reflect(-lightDir, vec3(outNormal));
|
|
float spec = pow(max(dot(viewDir, reflectDir), 0.0), 16.0);
|
|
|
|
float distance = length(light.position - outFragPos);
|
|
float attenuation = 1.0 / (1.0 + 0.09 * distance +
|
|
0.032 * (distance * distance));
|
|
|
|
vec3 ambient = light.ambient * outColor;
|
|
vec3 diffuse = light.diffuse * outColor;
|
|
vec3 specular = light.specular * spec * vec3(1.0, 1.0, 1.0);
|
|
|
|
ambient *= attenuation;
|
|
diffuse *= attenuation;
|
|
specular *= attenuation;
|
|
|
|
return (ambient + diffuse + specular);
|
|
}
|
|
|
|
// https://learnopengl.com/Lighting/Basic-Lighting
|
|
vec3 calculateBasicLight(Light light) {
|
|
vec3 lightDir = normalize(light.position - outFragPos);
|
|
|
|
float ambientStrength = 0.25;
|
|
vec3 ambient = ambientStrength * light.ambient;
|
|
|
|
float diff = max(dot(normalize(vec3(outNormal)), lightDir), 0.0);
|
|
vec3 diffuse = diff * light.diffuse;
|
|
|
|
float specularStrength = 0.5;
|
|
vec3 viewDir = normalize(outCameraPos - outFragPos);
|
|
vec3 reflectDir = reflect(-lightDir, outInverseNormal);
|
|
float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
|
|
vec3 specular = specularStrength * spec * light.specular;
|
|
|
|
return vec3(ambient + diffuse + specular);
|
|
}
|
|
|
|
vec3 calculateLighting() {
|
|
vec3 result = vec3(0.0, 0.0, 0.0);
|
|
|
|
for (int i = 0; i < min(int(outTotalLights), MAX_LIGHTS); i++) {
|
|
if (int(outLights[i].type) == 0) {
|
|
result += calculateBasicLight(outLights[i]);
|
|
} else if (int(outLights[i].type) == 1) {
|
|
result += calculateBasicLight(outLights[i]);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void main() {
|
|
lokiVar = vec4(outColor, 1.0) + outNormal + vec4(outUV, 1.0) + vec4(outTextureID, 1.0, 1.0, 1.0);
|
|
lokiVar = normalize(lokiVar);
|
|
|
|
vec3 result;
|
|
if (outDisableLighting == 1.0) {
|
|
result = outColor + 0.25;
|
|
} else {
|
|
result = calculateLighting() * outColor;
|
|
}
|
|
|
|
gl_FragColor = vec4(result, 1.0);
|
|
}
|