1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
/**
* @file terrainF.glsl
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* $/LicenseInfo$
*/
#version 120
uniform sampler2D detail_0;
uniform sampler2D detail_1;
uniform sampler2D detail_2;
uniform sampler2D detail_3;
uniform sampler2D alpha_ramp;
varying vec3 vary_normal;
void main()
{
/// Note: This should duplicate the blending functionality currently used for the terrain rendering.
vec4 color0 = texture2D(detail_0, gl_TexCoord[0].xy);
vec4 color1 = texture2D(detail_1, gl_TexCoord[0].xy);
vec4 color2 = texture2D(detail_2, gl_TexCoord[0].xy);
vec4 color3 = texture2D(detail_3, gl_TexCoord[0].xy);
float alpha1 = texture2D(alpha_ramp, gl_TexCoord[0].zw).a;
float alpha2 = texture2D(alpha_ramp,gl_TexCoord[1].xy).a;
float alphaFinal = texture2D(alpha_ramp, gl_TexCoord[1].zw).a;
vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
gl_FragData[0] = vec4(outColor.rgb, 0.0);
gl_FragData[1] = vec4(outColor.rgb*0.2, 0.2);
vec3 nvn = normalize(vary_normal);
gl_FragData[2] = vec4(nvn.xy * 0.5 + 0.5, nvn.z, 0.0);
}
|
