#version 330
in vec3 vsoNormal;
in vec4 vsoModPos;
in vec2 vsoTexCoord;
out vec4 fragColor;
uniform sampler2D tex0;
uniform sampler2D tex1;
uniform mat4 viewMatrix;
uniform vec4 lumPos;
uniform float fadeAmount;
const float fadeStart = 0;
const float fadeEnd = 1;
void main(void) {
const vec3 Vu = vec3(0, 0, -1);
vec4 lumPosv = viewMatrix * lumPos;
vec3 Ld = normalize(vsoModPos - lumPosv).xyz;
vec3 reflexion = normalize(reflect(Ld, vsoNormal));
float ispec = pow(clamp(dot(-Vu, reflexion), 0., 1.), 20);
float phongIL = clamp(dot(-Ld, vsoNormal), 0., 1.);
vec4 color1 = texture(tex0, vsoTexCoord);
vec4 color2 = texture(tex1, vsoTexCoord);
float fadeFactor = smoothstep(fadeStart, fadeEnd, 1 - vsoTexCoord.x);
fragColor = phongIL * mix(color1, color2, fadeFactor * fadeAmount) + ispec * vec4(1);
}
