31 lines
952 B
GLSL
31 lines
952 B
GLSL
#version 150
|
|
|
|
in vec2 vTexCoord;
|
|
in vec4 fragPosition;
|
|
in vec4 sunPosition;
|
|
|
|
out vec4 oColor;
|
|
|
|
uniform sampler2D uTexture;
|
|
uniform float farPlane;
|
|
uniform vec4 fogColor;
|
|
uniform vec3 cameraCenter;
|
|
uniform vec3 sunColor;
|
|
|
|
const float sunSize = 40.0;
|
|
|
|
void main() {
|
|
float distanceToSun = length(sunPosition - fragPosition);
|
|
float distanceCameraCenter = distance(cameraCenter, vec3(fragPosition));
|
|
float fogFactor = clamp((1.0 - ((farPlane - 35.0) -distanceCameraCenter)/30.0), 0.0, 1.0);
|
|
fogFactor *= clamp((1.0-((fragPosition.y-40.0)/30.0)), 0.0, 1.0);
|
|
if (distanceToSun < sunSize) {
|
|
float sunIntensity = clamp(0.3*exp(1/(distanceToSun/sunSize))-exp(1.0)*0.3, 0.0, 1.0);
|
|
vec4 color = mix(vec4(texture(uTexture, vTexCoord)), vec4(sunColor, sunIntensity), sunIntensity);
|
|
oColor = mix(color, fogColor, fogFactor);
|
|
}
|
|
else {
|
|
oColor = mix(texture(uTexture, vTexCoord), fogColor, fogFactor);
|
|
}
|
|
}
|