58 lines
2.0 KiB
GLSL
58 lines
2.0 KiB
GLSL
#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;
|
|
}
|