X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fmodel_sky_simple.fs;fp=shaders%2Fmodel_sky_simple.fs;h=e89379944e0c4135285ce8e2c2e1345516e0560f;hb=e61356f70eddb79f05d7b9e329e91963ec74f817;hp=0000000000000000000000000000000000000000;hpb=409edea2cf6271956137918e4e0b4f1c2addf620;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/model_sky_simple.fs b/shaders/model_sky_simple.fs
new file mode 100644
index 0000000..e893799
--- /dev/null
+++ b/shaders/model_sky_simple.fs
@@ -0,0 +1,46 @@
+uniform sampler2D uTexGarbage;
+uniform float uTime;
+
+in vec4 aColour;
+in vec2 aUv;
+in vec3 aNorm;
+in vec3 aCo;
+in vec3 aWorldCo;
+
+#include "common_world.glsl"
+#include "motion_vectors_fs.glsl"
+
+void main()
+{
+   compute_motion_vectors();
+
+   vec3 rd = normalize(aNorm);
+
+   float fintensity = 1.0-(abs(rd.y)*0.7);
+   float fblend = pow(fintensity,4.0);
+   vec3 horizon = vec3( 0.87, 0.93, 0.98 );
+   vec3 skycolour = vec3( 0.16, 0.58, 0.95 ) - rd.y*rd.y*0.5;
+   vec3 diffuse = mix( skycolour, horizon, fblend );
+
+   float fmove = uTime * 0.004;
+   vec2 cloudplane = (rd.xz / (rd.y*sign(rd.y))) * 0.05;
+   vec4 clouds1 = texture( uTexGarbage, cloudplane + vec2(0.1,0.4)*fmove*2.0 );
+   vec4 clouds2 = texture( uTexGarbage, cloudplane*2.0 + vec2(0.3,0.1)*fmove );
+
+   float cloud_d = max(clouds1.b*clouds2.r -0.2 - clouds2.g*0.4,0.0);
+   float cloud_e = pow(cloud_d,1.5)*pow(abs(rd.y),0.3)*2.0;
+
+   vec3 colour_ocean = vec3( 0.61, 0.84, 0.9 );
+   float fhorizon = step( rd.y * 0.5 + 0.5, 0.5 );
+
+   vec3 skycomp = mix(diffuse, vec3(1.0,1.0,1.0), cloud_e);
+
+
+   float sundot = clamp(dot(rd, -g_light_directions[0].xyz), 0.0, 1.0);
+   vec3 sun = 0.25 * vec3(1.0,0.7,0.4) * pow( sundot,5.0 );
+   sun += 0.25 * vec3(1.0,0.8,0.6) * pow( sundot,64.0 );
+   sun += 0.2 * vec3(1.0,0.8,0.6) * pow( sundot,512.0 );
+   skycomp += sun * g_light_colours[0].rgb;
+
+   oColour = vec4(skycomp,1.0);
+}