X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fscene_terrain.h;fp=shaders%2Fscene_terrain.h;h=5913d2c0d30d7e992be7a282ee37d8a8e6ee03fc;hb=f3a2490079baf440238b78e54f4476649eddbda2;hp=467cd91979c369de44f23795da8a16e7bea9eead;hpb=192990d6d24e53749ca046fef808a63cf162ab8a;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/scene_terrain.h b/shaders/scene_terrain.h
index 467cd91..5913d2c 100644
--- a/shaders/scene_terrain.h
+++ b/shaders/scene_terrain.h
@@ -108,6 +108,13 @@ static struct vg_shader _shader_scene_terrain = {
 "   return texture( g_world_depth, depth_coord ).r;\n"
 "}\n"
 "\n"
+"float world_water_depth( vec3 pos )\n"
+"{\n"
+"   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
+"   float ref_depth = g_water_plane.y*g_water_plane.w;\n"
+"   return texture( g_world_depth, depth_coord ).g - ref_depth;\n"
+"}\n"
+"\n"
 "float shadow_sample( vec3 vdir )\n"
 "{\n"
 "   vec3 sample_pos = aWorldCo + vdir;\n"