mirror of
https://github.com/Eaglercraft-Archive/Eaglercraftx-1.8.8-src.git
synced 2025-06-27 18:38:14 -05:00
80 lines
3.1 KiB
GLSL
80 lines
3.1 KiB
GLSL
#line 2
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/*
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* Copyright (c) 2023-2025 lax1dude. All Rights Reserved.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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precision lowp int;
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precision highp float;
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precision highp sampler2D;
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in vec2 v_position2f;
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in vec3 v_position3f;
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layout(location = 0) out vec4 output4f;
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uniform vec3 u_moonColor3f;
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uniform vec3 u_lightDir3f;
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uniform sampler2D u_moonTextures;
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uniform sampler2D u_cloudsTexture;
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#define MOON_SURFACE 0.9
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#define MOON_MARGIN 0.025
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#define MOON_MARGIN_1NSQ ((1.0 - MOON_MARGIN) * (1.0 - MOON_MARGIN))
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#define ATMOSPHERE_BIAS 0.02
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void main() {
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gl_FragDepth = 0.0;
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vec2 coord2f = v_position2f * 2.0 - 1.0;
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vec2 surfaceCoord2f = coord2f * (1.0 / MOON_SURFACE);
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float surfaceCoord2fDot = dot(surfaceCoord2f, surfaceCoord2f);
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vec3 moonNormal3f;
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vec4 color4f = vec4(0.0);
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float NdotV = 0.0;
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float atmos = 1.0;
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if(surfaceCoord2fDot < MOON_MARGIN_1NSQ) {
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color4f = texture(u_moonTextures, surfaceCoord2f * 0.5 + 0.5);
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moonNormal3f.xy = color4f.rg * 2.0 - 1.0;
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moonNormal3f.z = sqrt(1.0 - dot(moonNormal3f.xy, moonNormal3f.xy));
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NdotV = max(dot(moonNormal3f, u_lightDir3f), 0.0);
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atmos = 0.0;
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}
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float stupid = max(-u_lightDir3f.z - 0.5, 0.0) * 1.25;
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stupid *= stupid * stupid;
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vec3 viewDir = normalize(v_position3f);
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vec3 moonAtmosNormalInner3f = vec3(surfaceCoord2f, sqrt((MOON_MARGIN_1NSQ + ATMOSPHERE_BIAS) - surfaceCoord2fDot));
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vec3 moonAtmosNormalOuter3f = vec3(surfaceCoord2f, sqrt((-MOON_MARGIN_1NSQ + ATMOSPHERE_BIAS) + surfaceCoord2fDot));
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float NdotVInner = max(dot(moonAtmosNormalInner3f, u_lightDir3f), 0.0);
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float NdotVOuter = max(dot(moonAtmosNormalOuter3f, u_lightDir3f) + 0.35, 0.0);
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float atmosInner = max((MOON_SURFACE * 0.2 + stupid) / moonAtmosNormalInner3f.z - 0.2, 0.0);
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float atmosOuter = max((MOON_SURFACE * 0.2 + stupid) / moonAtmosNormalOuter3f.z - 0.4, 0.0);
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float atmosTotal = (1.0 - atmos) * NdotVInner * atmosInner + atmos * NdotVOuter * atmosOuter;
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output4f = vec4(u_moonColor3f * (color4f.b * color4f.b * NdotV + (atmosTotal * vec3(0.42, 0.5, 0.56))), 0.0);
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if(viewDir.y < 0.01) {
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return;
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}
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vec2 cloudSampleCoord2f = (viewDir.xz / (viewDir.y + 1.0)) * 0.975 * 0.5 + 0.5;
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vec4 cloudSample = textureLod(u_cloudsTexture, cloudSampleCoord2f, 0.0);
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output4f.rgb = mix(output4f.rgb, output4f.rgb * max(cloudSample.a * 1.25 - 0.25, 0.0), smoothstep(0.0, 1.0, min(viewDir.y * 8.0, 1.0)));
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}
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