From 6f6073be5de8c8598c4af7f38c90c3f83b5bf1bf Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Tue, 18 Dec 2018 21:08:20 +0100
Subject: Hacky mouse-based fluid interaction

---
 src/shader/code/collide.glsl | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/shader/code/collide.glsl')

diff --git a/src/shader/code/collide.glsl b/src/shader/code/collide.glsl
index 78d3936..2626c70 100644
--- a/src/shader/code/collide.glsl
+++ b/src/shader/code/collide.glsl
@@ -7,6 +7,10 @@ layout (std430, binding=1) buffer bufferCollide{ float collideCells[]; };
 layout (std430, binding=2) buffer bufferStream{  float streamCells[]; };
 layout (std430, binding=3) buffer bufferFluid{   float fluidCells[]; };
 
+uniform int mouseClicked;
+uniform int mouseX;
+uniform int mouseY;
+
 /// LBM constants
 
 uniform uint nX;
@@ -103,7 +107,11 @@ void main() {
 		return;
 	}
 
-	const float d = density(x,y);
+	float d = density(x,y);
+	if ( mouseClicked == 1 && abs(x - mouseX) < 3 && abs(y - mouseY) < 3 ) {
+		d = 1.5;
+	}
+
 	const vec2  v = velocity(x,y,d);
 
 	setFluid(x,y,v,d);
-- 
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