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#line 2
/*
* Copyright (c) 2023 lax1dude. All Rights Reserved.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
precision lowp int;
precision highp float;
precision highp sampler2D;
in vec2 v_position2f;
layout(location = 0) out float output1f;
uniform sampler2D u_noiseTexture;
uniform float u_textureSlice1f;
uniform vec2 u_textureSize2f;
uniform mat4x3 u_sampleOffsetMatrix4f;
uniform vec3 u_cloudMovement3f;
#define GET_CLOUDS(pos3f, accum, factor, tmp3f)\
tmp3f.z = floor(pos3f.z);\
tmp3f.xy = pos3f.xy * 0.015625 + (tmp3f.z * 0.265625);\
pos3f.x = textureLod(u_noiseTexture, tmp3f.xy, 0.0).x;\
pos3f.y = textureLod(u_noiseTexture, tmp3f.xy + 0.265625, 0.0).x;\
accum += mix(pos3f.x, pos3f.y, pos3f.z - tmp3f.z) * factor;
void main() {
vec3 p = vec3(v_position2f.x, u_textureSlice1f, v_position2f.y) * vec3(u_textureSize2f.x, 1.0, u_textureSize2f.y);
p = u_sampleOffsetMatrix4f * vec4(p, 1.0);
vec3 sampleCoord3f = p + u_cloudMovement3f;
float noise = 0.0;
vec3 in3f = sampleCoord3f;
GET_CLOUDS(in3f, noise, 0.5, p)
in3f = sampleCoord3f * 2.0 + u_cloudMovement3f;
GET_CLOUDS(in3f, noise, 0.25, p)
in3f = sampleCoord3f * 7.0 - u_cloudMovement3f;
GET_CLOUDS(in3f, noise, 0.125, p)
in3f = (sampleCoord3f + u_cloudMovement3f) * 16.0;
GET_CLOUDS(in3f, noise, 0.0625, p)
output1f = noise;
}
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