58 lines
1.4 KiB
GLSL
58 lines
1.4 KiB
GLSL
#version 330
|
|
// This source code is property of the Computer Graphics and Visualization
|
|
// chair of the TU Dresden. Do not distribute!
|
|
// Copyright (C) CGV TU Dresden - All Rights Reserved
|
|
|
|
in vec3 n;
|
|
in vec2 uv;
|
|
in vec2 road_uv;
|
|
|
|
out vec4 color;
|
|
|
|
uniform vec3 cameraPos;
|
|
|
|
uniform sampler2D grass;
|
|
uniform sampler2D rock;
|
|
uniform sampler2D alpha;
|
|
uniform sampler2D road;
|
|
uniform sampler2D specular_road;
|
|
|
|
uniform sampler2D background;
|
|
uniform vec2 screenSize;
|
|
|
|
const vec3 dirToLight = normalize(vec3(1, 3, 1));
|
|
|
|
//Calculates the visible surface color based on the Blinn-Phong illumination model
|
|
vec4 calculateLighting(vec4 materialColor, float specularIntensity, vec3 normalizedNormal, vec3 directionToViewer)
|
|
{
|
|
vec4 color = materialColor;
|
|
vec3 h = normalize(dirToLight + directionToViewer);
|
|
color.xyz *= 0.9 * max(dot(normalizedNormal, dirToLight), 0) + 0.1;
|
|
color.xyz += specularIntensity * pow(max(dot(h, normalizedNormal), 0), 50);
|
|
return color;
|
|
}
|
|
|
|
vec4 getBackgroundColor()
|
|
{
|
|
return texture(background, gl_FragCoord.xy / screenSize);
|
|
}
|
|
|
|
void main()
|
|
{
|
|
//surface geometry
|
|
//vec3 n = vec3(0, 1, 0);
|
|
vec3 dirToViewer = vec3(0, 1, 0);
|
|
|
|
//material properties
|
|
//color = vec4(0.6, 0.6, 0.6, 1);
|
|
color = mix(texture(grass, uv), texture(rock, uv), dot(n, dirToViewer));
|
|
color = mix(color, texture(road, road_uv), texture(alpha, uv).x);
|
|
|
|
float specular = texture(specular_road, road_uv).x;
|
|
|
|
//Calculate light
|
|
color = calculateLighting(color, specular, n, dirToViewer);
|
|
|
|
|
|
}
|