From 77295f7e90a9f242112ebd3725de660c988e20b7 Mon Sep 17 00:00:00 2001
From: amandaghassaei <amandaghassaei@gmail.com>
Date: Sun, 2 Apr 2017 18:37:54 -0400
Subject: [PATCH] boundaries
---
index.html | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/index.html b/index.html
index f4d29e2..78692ee 100644
--- a/index.html
+++ b/index.html
@@ -46,15 +46,15 @@
vec2 currentVelocity = texture2D(u_velocity, fragCoord/u_textureSize).xy;
//implicitly solve advection
-
+
if (length(currentVelocity) == 0.0) {//no velocity
gl_FragColor = vec4(texture2D(u_material, fragCoord/u_textureSize).x, 0, 0, 0);
return;
}
vec2 pxCenter = vec2(0.5, 0.5);
- vec2 pos = fragCoord - pxCenter - u_dt*currentVelocity;
- if (pos.x < 0.0 || pos.x >= u_textureSize.x || pos.y < 0.0 || pos.y >= u_textureSize.y){
+ vec2 pos = fragCoord - pxCenter + u_dt*currentVelocity;
+ if (pos.x < 0.0 || pos.x >= u_textureSize.x-1.0 || pos.y < 0.0 || pos.y >= u_textureSize.y-1.0){
//boundary
gl_FragColor = vec4(0);
return;
--
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