87 lines
3.4 KiB
GLSL
87 lines
3.4 KiB
GLSL
#ifndef INCLUDE_CLOUD_SHADOWS
|
|
#define INCLUDE_CLOUD_SHADOWS
|
|
|
|
#include "/lib/shaderSettings/cloudsAndLighting.glsl"
|
|
|
|
#ifdef CLOUDS_REIMAGINED
|
|
#include "/lib/atmospherics/clouds/cloudCoord.glsl"
|
|
#endif
|
|
|
|
float GetCloudShadow(vec3 playerPos) {
|
|
#ifndef OVERWORLD
|
|
return 1.0;
|
|
#endif
|
|
|
|
float cloudShadow = 1.0;
|
|
|
|
vec3 worldPos = playerPos + cameraPosition;
|
|
#if defined DO_PIXELATION_EFFECTS && defined PIXELATED_SHADOWS
|
|
//worldPos = playerPosPixelated + cameraPosition; // Disabled for now because cloud shadows are too soft to notice pixelation
|
|
#endif
|
|
|
|
#ifdef CLOUDS_REIMAGINED
|
|
float EdotL = dot(eastVec, lightVec);
|
|
float EdotLM = tan(acos(EdotL));
|
|
|
|
#if SUN_ANGLE != 0
|
|
float NVdotLM = tan(acos(dot(northVec, lightVec)));
|
|
#endif
|
|
|
|
float distToCloudLayer1 = cloudAlt1i - worldPos.y;
|
|
vec3 cloudOffset1 = vec3(distToCloudLayer1 / EdotLM, 0.0, 0.0);
|
|
#if SUN_ANGLE != 0
|
|
cloudOffset1.z += distToCloudLayer1 / NVdotLM;
|
|
#endif
|
|
vec2 cloudPos1 = GetRoundedCloudCoord(ModifyTracePos(worldPos + cloudOffset1, cloudAlt1i).xz, CLOUD_SHADOW_ROUNDNESS);
|
|
|
|
#ifndef COMPOSITE
|
|
float cloudSample = texture2D(gaux4, cloudPos1).b;
|
|
#else
|
|
float cloudSample = texture2D(cloudWaterTex, cloudPos1).b;
|
|
#endif
|
|
cloudSample *= clamp(distToCloudLayer1 * 0.1, 0.0, 1.0);
|
|
|
|
#ifdef DOUBLE_REIM_CLOUDS
|
|
float distToCloudLayer2 = cloudAlt2i - worldPos.y;
|
|
vec3 cloudOffset2 = vec3(distToCloudLayer2 / EdotLM, 0.0, 0.0);
|
|
#if SUN_ANGLE != 0
|
|
cloudOffset2.z += distToCloudLayer2 / NVdotLM;
|
|
#endif
|
|
vec2 cloudPos2 = GetRoundedCloudCoord(ModifyTracePos(worldPos + cloudOffset2, cloudAlt2i).xz, CLOUD_SHADOW_ROUNDNESS);
|
|
float cloudSample2 = texture2D(gaux4, cloudPos2).b;
|
|
cloudSample2 *= clamp(distToCloudLayer2 * 0.1, 0.0, 1.0);
|
|
|
|
cloudSample = 1.0 - (1.0 - cloudSample) * (1.0 - cloudSample2);
|
|
#endif
|
|
|
|
cloudSample *= sqrt3(1.0 - abs(EdotL));
|
|
cloudShadow = 1.0 - 0.85 * cloudSample;
|
|
#else
|
|
vec2 csPos = worldPos.xz + worldPos.y * 0.25;
|
|
csPos.x += syncedTime;
|
|
csPos *= 0.000002 * CLOUD_UNBOUND_SIZE_MULT * CLOUD_SHADOW_UNBOUND_SIZE;
|
|
|
|
vec2 shadowoffsets[8] = vec2[8](
|
|
vec2( 0.0 , 1.0 ),
|
|
vec2( 0.7071, 0.7071),
|
|
vec2( 1.0 , 0.0 ),
|
|
vec2( 0.7071,-0.7071),
|
|
vec2( 0.0 ,-1.0 ),
|
|
vec2(-0.7071,-0.7071),
|
|
vec2(-1.0 , 0.0 ),
|
|
vec2(-0.7071, 0.7071));
|
|
float cloudSample = 0.0;
|
|
for (int i = 0; i < 8; i++) {
|
|
cloudSample += texture2DLod(noisetex, csPos + 0.005 * shadowoffsets[i], 0.0).b;
|
|
}
|
|
|
|
cloudShadow = smoothstep1(pow2(min1(cloudSample * 0.2)));
|
|
#endif
|
|
|
|
cloudShadow = mix(1.0, mix(cloudShadow, 1.0, NIGHT_CLOUD_UNBOUND_REMOVE * (1.0 - sunVisibility)), CLOUD_TRANSPARENCY);
|
|
|
|
return cloudShadow;
|
|
}
|
|
|
|
#endif
|