115 lines
3.0 KiB
GLSL
115 lines
3.0 KiB
GLSL
#version 330 core
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in vec2 texCoord;
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in vec3 normals;
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in vec3 fragPos;
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in vec4 fragPosLightSpace[16];
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struct Camera {
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vec3 pos;
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};
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struct Material {
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bool hasDiffuseTex;
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sampler2D diffuseTexture;
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vec3 diffuseColor;
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bool hasSpecTex;
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sampler2D specularTexture;
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float specPower;
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};
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struct Light {
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//Directional = 1, Point = 2
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int type;
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vec3 pos;
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vec3 color;
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float strength;
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sampler2D depthTex;
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};
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uniform Camera camera;
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uniform Material material;
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uniform Light light[100];
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uniform int numberOfLights;
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uniform bool isContinued;
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out vec4 outColor;
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float calcShadow(int lightNum, vec4 fragPosLight, vec3 no, vec3 lDir) {
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vec3 fp = fragPosLight.xyz / fragPosLight.w;
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fp = fp * 0.5 + 0.5;
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float current = fp.z;
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float bias = max(0.05 * (1.0 - dot(no, lDir)), 0.005);
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float shad = 0.0f;
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vec2 texSize = 1.0 / textureSize(light[lightNum].depthTex, 0);
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for (int x = -1; x <= 1; x++) {
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for (int y = -1; y <= 1; y++) {
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float pcfDepth = texture(light[lightNum].depthTex, fp.xy + vec2(x, y) * texSize).r;
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shad += current - bias > pcfDepth ? 1.0 : 0.0;
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}
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}
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shad /= 9.0;
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if (current > 1.0)
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shad = 0.0;
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return shad;
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}
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void main() {
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vec3 color = vec3(0.0);
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vec3 matDiff;
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if (material.hasDiffuseTex)
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matDiff = texture(material.diffuseTexture, texCoord).rgb;
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else
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matDiff = material.diffuseColor;
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vec3 matSpec = vec3(1.0);
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if (material.hasSpecTex)
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matSpec = texture(material.specularTexture, texCoord).rgb;
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float ambientStrength = 0.2f;
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vec3 ambient = ambientStrength * matDiff;
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if (!isContinued)
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color += ambient;
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for (int i = 0; i < numberOfLights; i++) {
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if (i == numberOfLights - 1 && numberOfLights == 1) {
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break;
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}
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if (light[i].type == 1) {
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vec3 lightDir = normalize(light[i].pos - fragPos);
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vec3 norm = normalize(normals);
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float diff = max(dot(norm, lightDir), 0.0);
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vec3 diffuse = light[i].color * (diff * matDiff) * (light[i].strength / 2.0f);
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vec3 viewDir = normalize(camera.pos - fragPos);
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vec3 reflectDir = reflect(-lightDir, norm);
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.specPower);
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vec3 specular = light[i].color * spec * matSpec * (light[i].strength / 2.0f);
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float shadow = calcShadow(i, fragPosLightSpace[i], norm, lightDir);
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color += (diffuse + specular) * (1.0 - shadow);
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continue;
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}
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if (light[i].type == 2) {
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vec3 lightDir = normalize(light[i].pos - fragPos);
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vec3 norm = normalize(normals);
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float diff = max(dot(norm, lightDir), 0.0);
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vec3 diffuse = light[i].color * (diff * matDiff) * (light[i].strength / 2.0f);
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vec3 viewDir = normalize(camera.pos - fragPos);
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vec3 reflectDir = reflect(-lightDir, norm);
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float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.specPower);
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vec3 specular = light[i].color * spec * matSpec * (light[i].strength / 2.0f);
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float length = length(light[i].pos - fragPos);
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float att = clamp(10.0 / length, 0.0, 1.0) * light[i].strength;
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color += ((diffuse + specular) * att);
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continue;
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}
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}
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outColor = vec4(color, 1.0);
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}
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