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Getting the relief back for forest

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This commit is contained in:
gral@who.net 2010-08-25 17:20:54 +02:00
parent 8e645e61f5
commit d135816375
1 changed files with 19 additions and 30 deletions
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49
Shaders/forest.frag
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@ -85,7 +85,7 @@ void main (void)
}
vec4 basecolor = texture2D(SampleTex, rawpos.xy*0.000144);
vec4 basecolor = texture2D(SampleTex, rawpos.xy*0.000344);
vec4 basecolor2 = texture2D(SampleTex2, rawpos.xy*0.000144);
basecolor = texture1D(ColorsTex, basecolor.r+0.0);
@ -120,6 +120,11 @@ void main (void)
vec4 c2;
c2 = basecolor2 * vec4(smoothstep(-1.3, 0.5, n), smoothstep(-1.3, 0.5, n), smoothstep(-2.0, 0.9, n), 0.0);
N = normalize(N.x * VTangent + N.y * VBinormal + N.z * VNormal);
vec3 l = gl_LightSource[0].position.xyz;
vec3 diffuse;
//vec3 diffuse = gl_Color.rgb * max(0.6, dot(N, l)) * max(0.9, dot(VNormal, gl_LightSource[0].position.xyz));
//draw floor where !steep, and another blurb for smoothing transitions
vec4 c3, c4, c5;
c3 = mix(vec4(n-0.88, n-0.14, -n, 0.0), c1, smoothstep(0.990, 0.970, abs(normalize(Normal).z)+nvL[2]*1.3));
@ -129,59 +134,43 @@ void main (void)
if (vegetationlevel <= 2200) {
c1 = mix(c2, c5, clamp(0.65, n*0.5, 0.4));
diffuse = gl_Color.rgb * max(0.3, dot(N, l)) * max(0.9, dot(VNormal, gl_LightSource[0].position.xyz));
}
if (vegetationlevel > 2200 && vegetationlevel < 2300) {
c1 = mix(c2, c5, clamp(0.65, n*0.5, 0.2));
diffuse = gl_Color.rgb * max(0.6, dot(N, l)) * max(0.9, dot(VNormal, gl_LightSource[0].position.xyz));
}
if (vegetationlevel >= 2300 || vegetationlevel < 2530) {
c1 = mix(c1, c5, clamp(0.65, n*0.5, 0.4));
if (vegetationlevel >= 2300 && vegetationlevel < 2530) {
c1 = mix(c2, c5, clamp(0.65, n*0.5, 0.4));
diffuse = gl_Color.rgb * max(0.9, dot(VNormal, gl_LightSource[0].position.xyz));
}
if (vegetationlevel >= 2530 && vegetationlevel < 2670) {
c1 = mix(c2, c5, clamp(0.65, n*0.5, 0.1));
diffuse = gl_Color.rgb * max(0.9, dot(VNormal, gl_LightSource[0].position.xyz));
}
if (vegetationlevel >= 2670) {
c1 = mix(c2, c5, clamp(0.65, n*0.5, 0.1));
diffuse = gl_Color.rgb * max(0.9, dot(VNormal, gl_LightSource[0].position.xyz));
}
//adding snow and permanent snow/glacier
if (vegetationlevel > snowlevel || vegetationlevel > 3100) {
c3 = mix(vec4(n+0.94, n+0.94, n+1.0, 0.7), c1, smoothstep(0.990, 0.965, abs(normalize(Normal).z)+nvL[2]*1.3));
c4 = mix(vec4(n+0.94, n+0.94, n+1.0, 0.7), c1, smoothstep(0.990, 0.965, abs(normalize(Normal).z)+nvL[2]*1.2));
c3 = mix(vec4(n+1.0, n+1.0, n+1.0, 0.0), c1, smoothstep(0.990, 0.965, abs(normalize(Normal).z)+nvL[2]*1.3));
c4 = mix(vec4(n+1.0, n+1.0, n+1.0, 0.0), c1, smoothstep(0.990, 0.965, abs(normalize(Normal).z)+nvL[2]*0.9));
c5 = mix(c3, c4, 1.0);
c1 = mix(c1, c5, clamp(0.65, -n, 0.6));
diffuse = gl_Color.rgb * max(0.3, dot(VNormal, gl_LightSource[0].position.xyz));
}
N = normalize(N.x * VTangent + N.y * VBinormal + N.z * VNormal);
vec3 l = gl_LightSource[0].position.xyz;
vec3 diffuse = gl_Color.rgb * max(0.0, dot(N, l));
float shadow_factor = 1.0;
//should come as varying!
vec4 constantColor = vec4(1.0, 1.0, 1.0, 0.0);
vec4 constantColor = vec4(1.0, 1.0, 1.0, 1.0);
// Shadow
if ( quality_level >= 3.0 ) {
dp += ds * d;
vec3 sl = normalize( vec3( dot( l, VTangent ), dot( l, VBinormal ), dot( -l, VNormal ) ) );
ds = sl.xy * depth_factor / sl.z;
dp -= ds * d;
float dl = ray_intersect(NormalTex, dp, ds);
if ( dl < d - 0.05 )
shadow_factor = dot( constantColor.xyz, vec3( 1.0, 1.0, 1.0 ) ) * 0.25;
}
// end shadow
//old snow
//c1 = mix(c1, clamp(n+nvL[2]*4.1+vec4(0.1, 0.1, nvL[2]*2.2, 1.0), 0.7, 1.0), smoothstep(snowlevel+300.0, snowlevel+360.0, (rawpos.z)+nvL[1]*3000.0));
//diffuse = gl_Color.rgb * max(0.4, dot(VNormal, gl_LightSource[0].position.xyz));
vec4 ambient_light = gl_LightSource[0].diffuse * shadow_factor * vec4(diffuse, 1.0);
vec4 ambient_light = gl_LightSource[0].diffuse * constantColor * vec4(diffuse, 1.0);
c1 *= ambient_light;
vec4 finalColor = c1;