huskee/Pixelorama
1
0
Fork 0
mirror of https://github.com/Orama-Interactive/Pixelorama.git synced 2025-01-19 01:29:49 +00:00
Code Issues Wiki Activity

Fix HTML5 shader issue

Browse source 
The MarchingAntsOutline was failing to compile on the Web platform due to the for loop not having constant expressions inside the shader. "Loop index cannot be initialized with non-constant expression"
This commit is contained in:
Manolis Papadeas 2021-04-17 22:33:13 +03:00
parent 27cb0d2d2f
commit 38711d2ccf
1 changed files with 13 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
src/Shaders/MarchingAntsOutline.shader
View file

@ -5,24 +5,24 @@ shader_type canvas_item;
uniform vec4 first_color : hint_color = vec4(1.0);
uniform vec4 second_color : hint_color = vec4(0.0, 0.0, 0.0, 1.0);
uniform bool animated = true;
uniform float width : hint_range(0, 2) = 0.2;
uniform float width : hint_range(0, 2) = 0.05;
uniform float frequency = 50.0;
uniform float stripe_direction : hint_range(0, 1) = 0.5;
bool hasContraryNeighbour(vec2 uv, vec2 texture_pixel_size, sampler2D texture) {
for (float i = -ceil(width); i <= ceil(width); i++) {
float x = abs(i) > width ? width * sign(i) : i;
float offset = width;
for (float j = -ceil(offset); j <= ceil(offset); j++) {
float y = abs(j) > offset ? offset * sign(j) : j;
vec2 xy = uv + texture_pixel_size * vec2(x, y);
if ((xy != clamp(xy, vec2(0.0), vec2(1.0)) || texture(texture, xy).a == 0.0) == true) {
return true;
}
}
float i = -ceil(width);
float j = ceil(width);
float x1 = abs(i) > width ? width * sign(i) : i;
float x2 = abs(j) > width ? width * sign(j) : j;
float y1 = abs(i) > width ? width * sign(i) : i;
float y2 = abs(j) > width ? width * sign(j) : j;
vec2 xy1 = uv + texture_pixel_size * vec2(x1, y1);
vec2 xy2 = uv + texture_pixel_size * vec2(x2, y2);
if (xy1 != clamp(xy1, vec2(0.0), vec2(1.0)) || texture(texture, xy1).a == 0.0 || xy2 != clamp(xy2, vec2(0.0), vec2(1.0)) || texture(texture, xy2).a == 0.0) {
return true;
}
return false;