51 lines
1.9 KiB
Plaintext
51 lines
1.9 KiB
Plaintext
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#line 2
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/*
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* Copyright (c) 2023 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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layout(location = 0) out float occlusionOut1f;
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uniform mat4x3 u_sampleMatrix4x3f;
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uniform sampler2D u_cloudsTexture;
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#define SAMPLE_DENSITY(v, a_, f)\
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f = u_sampleMatrix4x3f * v;\
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f.xy = (f.xz / (f.y + 1.0)) * 0.975 * 0.5 + 0.5;\
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if(f.xy == clamp(f.xy, vec2(0.001), vec2(0.999)))\
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a_ += textureLod(u_cloudsTexture, f.xy, 0.0).a * 0.125;\
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else\
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a_ += 0.125;
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void main() {
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vec3 f;
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float accum = 0.0;
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SAMPLE_DENSITY(vec4(0.000, 0.000, 1.000, 1.0), accum, f)
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SAMPLE_DENSITY(vec4(0.844, 0.521, 0.126, 1.0), accum, f)
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SAMPLE_DENSITY(vec4(-0.187, 0.979, 0.087, 1.0), accum, f)
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SAMPLE_DENSITY(vec4(0.402, -0.904, 0.145, 1.0), accum, f)
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SAMPLE_DENSITY(vec4(-0.944, -0.316, 0.098, 1.0), accum, f)
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SAMPLE_DENSITY(vec4(-0.759, 0.427, 0.491, 1.0), accum, f)
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SAMPLE_DENSITY(vec4(0.955, -0.285, 0.076, 1.0), accum, f)
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SAMPLE_DENSITY(vec4(-0.322, -0.664, 0.675, 1.0), accum, f)
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occlusionOut1f = clamp(sqrt(accum) * 3.0 - 1.0, 0.0, 1.0);
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}
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