From ce334547f0f0560386ca8b97f354d83da68019a5 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sun, 16 Dec 2018 22:09:17 +0100
Subject: Generate fluid display using geometry shaders

This should provide much more flexibility.

For our purpose it would be useful if the vertex shader was executed
after the geometry shader (to apply the projection matrix) but alas
this is not the case. Thus the MVP matrix is applied during geometry
construction and the vertex shader only provides density extraction.
---
 src/shader/code/collide.glsl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

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

diff --git a/src/shader/code/collide.glsl b/src/shader/code/collide.glsl
index 90af535..936ca89 100644
--- a/src/shader/code/collide.glsl
+++ b/src/shader/code/collide.glsl
@@ -13,7 +13,7 @@ uniform uint nY;
 const uint  q     = 9;
 const float omega = 0.6;
 
-const float velocityDisplayScalar = 500.;
+const float displayAmplifier = 50.;
 
 float get(uint x, uint y, int i, int j) {
 	return collideCells[q*nX*y + q*x + (i+1)*3 + j+1];
@@ -24,8 +24,8 @@ void set(uint x, uint y, int i, int j, float v) {
 }
 
 void setFluid(uint x, uint y, vec2 v, float d) {
-	fluidCells[3*nX*y + 3*x + 0] = float(x)-nX/2 + velocityDisplayScalar*v.x;
-	fluidCells[3*nX*y + 3*x + 1] = float(y)-nY/2 + velocityDisplayScalar*v.y;
+	fluidCells[3*nX*y + 3*x + 0] = float(x)-nX/2 + displayAmplifier*v.x;
+	fluidCells[3*nX*y + 3*x + 1] = float(y)-nY/2 + displayAmplifier*v.y;
 	fluidCells[3*nX*y + 3*x + 2] = d;
 }
 
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