small chnages

index.html

@@ -440,7 +440,7 @@
                 <img style="width:100%" src="img2.png"/>
                 <br/><br/>
                 To learn more about the math involved, check out the following sources:<br/>
-                <a href="https://pdfs.semanticscholar.org/84b8/c7b7eecf90ebd9d54a51544ca0f8ff93c137.pdf" target="_blank">Real-time ink simulation using a grid-particle method</a> - mixing Eulerian and Lagrangian techniques for fluids<br/>
+                <a href="https://pdfs.semanticscholar.org/84b8/c7b7eecf90ebd9d54a51544ca0f8ff93c137.pdf" target="_blank">Real-time ink simulation using a grid-particle method</a> - mixing Eulerian and Lagrangian techniques for fluids.<br/>
                 <a href="http://http.developer.nvidia.com/GPUGems/gpugems_ch38.html" target="_blank">Fast Fluid Dynamics Simulation on the GPU</a> - a very well written tutorial about programming the Navier-Stokes equations on a GPU.
                 Though not WebGL specific, it was still very useful.<br/>
                 <a href="http://jamie-wong.com/2016/08/05/webgl-fluid-simulation/" target="_blank">Fluid Simulation (with WebGL demo)</a> - this article has some nice, interactive graphics that helped me debug my code.<br/>

js/GPUMath.js

@@ -9,13 +9,15 @@ function initGPUMath(){
 
     var canvas = document.getElementById("glcanvas");
     var gl = canvas.getContext("webgl", {antialias:false}) || canvas.getContext("experimental-webgl", {antialias:false});
-    gl.getExtension('OES_texture_float');
+    var floatTextures = gl.getExtension("OES_texture_float");
+    if (!floatTextures) {
+       console.warn("floating point textures are not supported on your system");
+    }
     gl.disable(gl.DEPTH_TEST);
 
     var maxTexturesInFragmentShader = gl.getParameter(gl.MAX_TEXTURE_IMAGE_UNITS);
     console.log(maxTexturesInFragmentShader + " textures max");
 
-
     function GPUMath(){
         this.reset();
     }