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| #version 440
#define saturate(x) clamp(x, 0., 1.)
struct Material
{
vec3 ambient;
vec3 diffuse;
vec3 specular;
sampler2D diffuseMap;
};
in vec3 vs_position;
in vec3 vs_color;
in vec2 vs_texcoord;
in vec3 vs_normal;
out vec4 fs_color;
// ====================== Uniforms =========================
uniform Material material;
uniform sampler2D wallTex;
uniform vec3 lightPos0; // Main Light World Position
uniform vec3 cameraPos; // Camera World Position
void main()
{
vec3 worldPos = vs_position;
// ====================== World Vectors =========================
vec3 worldNormal = normalize(vs_normal);
vec3 worldLight = normalize(lightPos0 - worldPos);
vec3 worldView = normalize(cameraPos - worldPos);
vec3 worldHalf = normalize(worldLight + worldView);
// ====================== Lighting ==============================
// Ambient Light
vec3 ambient = vec3(1.);
// Diffuse Light
float NdL = dot(worldNormal, worldLight);
float diffuse = saturate(NdL);
// Specular Light - Blinn Phong
float NdH = dot(worldNormal, worldHalf);
float specBpPower = 500.;
float specBP = pow(saturate(NdH), specBpPower);
// Rim Light
//float NdV = dot(worldNormal, worldView);
//float rimPower = 1.;
//float rim = pow(1. - saturate(NdV), rimPower) * 2.;
// ====================== Textures ==============================
vec3 diffMapCol = texture(material.diffuseMap, vs_texcoord).xyz;
vec3 diffMapMask = step(vec3(0.01), diffMapCol);
vec3 wallMapCol = texture(wallTex, vs_texcoord).xyz;
// ====================== Colors ================================
vec3 ambientCol = material.ambient;
vec3 diffCol = mix(wallMapCol, diffMapCol * material.diffuse, diffMapMask);
vec3 specCol = material.specular;
vec3 lightCol = vec3(1., 1., 1.);
// ====================== Final Colors ==========================
ambientCol = ambient * ambientCol;
diffCol = diffuse * diffCol;
specCol = specBP * specCol;
vec3 col = (diffCol + specCol) * lightCol + ambientCol;
fs_color = vec4(col, 1.);
}
|
