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-rw-r--r--src/shader/code/collide.glsl18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/shader/code/collide.glsl b/src/shader/code/collide.glsl
index 23e98f9..cb950cb 100644
--- a/src/shader/code/collide.glsl
+++ b/src/shader/code/collide.glsl
@@ -110,6 +110,16 @@ float getExternalPressureInflux(uint x, uint y) {
}
}
+/// Domain description
+
+bool isEndOfWorld(uint x, uint y) {
+ return x == 0 || x == nX-1 || y == 0 || y == nY-1;
+}
+
+bool isOuterWall(uint x, uint y) {
+ return x == 1 || x == nX-2 || y == 1 || y == nY-2;
+}
+
/// Actual collide kernel
void main() {
@@ -120,6 +130,14 @@ void main() {
return;
}
+ if ( isEndOfWorld(x,y) ) {
+ return;
+ }
+
+ if ( isOuterWall(x,y) ) {
+ return;
+ }
+
const float d = max(getExternalPressureInflux(x,y), density(x,y));
const vec2 v = velocity(x,y,d);