Clean up WebGLMultiview

src/renderers/webgl/WebGLMultiview.js

 function WebGLMultiview( requested, gl, canvas, extensions, capabilities ) {
 
-  this.isAvailable = function () {
+	this.isAvailable = function () {
 
-    return capabilities.multiview;
+		return capabilities.multiview;
 
-  }
+	};
 
-  this.getMaxViews = function () {
+	this.getMaxViews = function () {
 
-    return capabilities.maxMultiviewViews;
+		return capabilities.maxMultiviewViews;
 
-  }
+	};
 
-  this.isEnabled = function () {
+	this.isEnabled = function () {
 
-    return requested && this.isAvailable();
+		return requested && this.isAvailable();
 
-  }
+	};
 
 
 	if ( requested && ! this.isAvailable() ) {
@@ -27,10 +27,10 @@ function WebGLMultiview( requested, gl, canvas, extensions, capabilities ) {
 
 		console.info( 'WebGLRenderer: Multiview enabled' );
 
-  }
+	}
 
-	var numViews = 2;
-  var framebuffer; // multiview framebuffer.
+	var numViews = 2; // @todo Based on arrayCamera
+	var framebuffer; // multiview framebuffer.
 	var viewFramebuffer; // single views inside the multiview framebuffer.
 	var framebufferWidth = 0;
 	var framebufferHeight = 0;
@@ -41,14 +41,15 @@ function WebGLMultiview( requested, gl, canvas, extensions, capabilities ) {
 	};
 
 
+  // @todo Get ArrayCamera
 	this.createMultiviewRenderTargetTexture = function () {
 
-    var halfWidth = Math.floor( canvas.width * 0.5 );
+		var halfWidth = Math.floor( canvas.width * 0.5 );
 
 		framebuffer = gl.createFramebuffer();
 		gl.bindFramebuffer( gl.FRAMEBUFFER, framebuffer );
 
-    var ext = extensions.get( 'OVR_multiview2' );
+		var ext = extensions.get( 'OVR_multiview2' );
 
 		texture.color = gl.createTexture();
 		gl.bindTexture( gl.TEXTURE_2D_ARRAY, texture.color );
@@ -71,30 +72,39 @@ function WebGLMultiview( requested, gl, canvas, extensions, capabilities ) {
 			gl.bindFramebuffer( gl.FRAMEBUFFER, viewFramebuffer[ viewIndex ] );
 			gl.framebufferTextureLayer( gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, texture.color, 0, viewIndex );
 
-  }
+		}
+
 		framebufferWidth = halfWidth;
 		framebufferHeight = canvas.height;
-};
+
+	};
 
 	this.bindMultiviewFrameBuffer = function ( camera ) {
 
-    var halfWidth = Math.floor( canvas.width * 0.5 );
-    if (camera.isArrayCamera) {
+		var width = canvas.width;
+		var height = canvas.height;
+
+		if ( camera.isArrayCamera ) {
 
-    } else {
-      halfWidth *= 2;
-    }
+			// Every camera must have the same size, so we just get the size from the first one
+			var bounds = camera.cameras[ 0 ].bounds;
 
-		if ( framebufferWidth < halfWidth || framebufferHeight < canvas.height ) {
-			console.log( 'WebGLMultiview: Updating multiview FBO with dimensions: ', halfWidth, canvas.height );
+			width *= bounds.z;
+			height *= bounds.w;
+
+		}
+
+		if ( framebufferWidth < width || framebufferHeight < height ) {
+
+			console.log( 'WebGLMultiview: Updating multiview FBO with dimensions: ', width, height );
 			gl.bindTexture( gl.TEXTURE_2D_ARRAY, texture.color );
-      gl.texImage3D(gl.TEXTURE_2D_ARRAY, 0, gl.RGBA8, halfWidth, canvas.height, numViews, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
+			gl.texImage3D( gl.TEXTURE_2D_ARRAY, 0, gl.RGBA8, width, height, numViews, 0, gl.RGBA, gl.UNSIGNED_BYTE, null );
 			gl.bindTexture( gl.TEXTURE_2D_ARRAY, texture.depthStencil );
-			gl.texImage3D(gl.TEXTURE_2D_ARRAY, 0, gl.DEPTH24_STENCIL8, halfWidth, canvas.height, numViews, 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, null);
-			framebufferWidth = halfWidth;
-			framebufferHeight = canvas.height;
+			gl.texImage3D( gl.TEXTURE_2D_ARRAY, 0, gl.DEPTH24_STENCIL8, width, height, numViews, 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, null );
+			framebufferWidth = width;
+			framebufferHeight = height;
 
-    }
+		}
 
 		gl.bindFramebuffer( gl.DRAW_FRAMEBUFFER, framebuffer );
 
@@ -102,43 +112,40 @@ function WebGLMultiview( requested, gl, canvas, extensions, capabilities ) {
 
 	this.unbindMultiviewFrameBuffer = function ( camera ) {
 
-    gl.bindFramebuffer( gl.DRAW_FRAMEBUFFER, null );
+		gl.bindFramebuffer( gl.DRAW_FRAMEBUFFER, null );
 
-    if ( camera.isArrayCamera ) {
+		if ( camera.isArrayCamera ) {
 
+			for ( var i = 0; i < camera.cameras.length; i ++ ) {
 
-      for ( var i = 0; i < camera.cameras.length; i ++ ) {
+				var bounds = camera.cameras[ i ].bounds;
 
-        var bounds = camera.cameras[ i ].bounds;
+				var x = bounds.x * canvas.width;
+				var y = bounds.y * canvas.height;
+				var width = bounds.z * canvas.width;
+				var height = bounds.w * canvas.height;
 
-        var x = bounds.x * canvas.width;
-        var y = bounds.y * canvas.height;
-        var width = bounds.z * canvas.width;
-        var height = bounds.w * canvas.height;
+				gl.bindFramebuffer( gl.READ_FRAMEBUFFER, viewFramebuffer[ i ] );
+				gl.blitFramebuffer( 0, 0, width, height, x, y, x + width, y + height, gl.COLOR_BUFFER_BIT, gl.NEAREST );
 
-        gl.bindFramebuffer( gl.READ_FRAMEBUFFER, viewFramebuffer[ i ] );
-        gl.blitFramebuffer( 0, 0, width, height, x, y, x + width, y + height, gl.COLOR_BUFFER_BIT, gl.NEAREST );
+			}
 
-      }
+		} else {
 
-    } else {
+			gl.bindFramebuffer( gl.READ_FRAMEBUFFER, viewFramebuffer[ 0 ] );
+			gl.blitFramebuffer( 0, 0, canvas.width, canvas.height, 0, 0, canvas.width, canvas.height, gl.COLOR_BUFFER_BIT, gl.NEAREST );
 
-      gl.bindFramebuffer( gl.READ_FRAMEBUFFER, viewFramebuffer[ 0 ] );
-      gl.blitFramebuffer( 0, 0, canvas.width, canvas.height, 0, 0, canvas.width, canvas.height, gl.COLOR_BUFFER_BIT, gl.NEAREST );
-
-    }
+		}
 
 	};
 
 
-  if ( this.isEnabled() ) {
+	if ( this.isEnabled() ) {
 
-    this.createMultiviewRenderTargetTexture();
+		this.createMultiviewRenderTargetTexture();
 
-  }
+	}
 
 }
 
-
-
 export { WebGLMultiview };