Merge pull request #5553 from aferriss/matrix-uniforms-bug

Fixes bug introduced by #5483

Author: stalgiag

src/webgl/p5.Shader.js

@@ -178,7 +178,17 @@ p5.Shader.prototype._loadUniforms = function() {
       samplerIndex++;
       this.samplers.push(uniform);
     }
-    uniform.isArray = uniformInfo.size > 1;
+
+    uniform.isArray =
+      uniformInfo.size > 1 ||
+      uniform.type === gl.FLOAT_MAT3 ||
+      uniform.type === gl.FLOAT_MAT4 ||
+      uniform.type === gl.FLOAT_VEC2 ||
+      uniform.type === gl.FLOAT_VEC3 ||
+      uniform.type === gl.FLOAT_VEC4 ||
+      uniform.type === gl.INT_VEC2 ||
+      uniform.type === gl.INT_VEC4 ||
+      uniform.type === gl.INT_VEC3;
 
     this.uniforms[uniformName] = uniform;
   }