Fix picking

Author: greggman

webgl/lessons/ko/webgl-picking.md

@@ -376,8 +376,8 @@ const pixelY = gl.canvas.height - mouseY * gl.canvas.height / gl.canvas.clientHe
 
 const subLeft = left + pixelX * width / gl.canvas.width;
 const subBottom = bottom + pixelY * height / gl.canvas.height;
-const subWidth = 1 / gl.canvas.width;
-const subHeight = 1 / gl.canvas.height;
+const subWidth = width / gl.canvas.width;
+const subHeight = height / gl.canvas.height;
 
 // 해당 1픽셀에 대한 절두체 만들기
 const projectionMatrix = m4.frustum(

webgl/lessons/webgl-picking.md

@@ -442,8 +442,8 @@ const pixelY = gl.canvas.height - mouseY * gl.canvas.height / gl.canvas.clientHe
 
 const subLeft = left + pixelX * width / gl.canvas.width;
 const subBottom = bottom + pixelY * height / gl.canvas.height;
-const subWidth = 1 / gl.canvas.width;
-const subHeight = 1 / gl.canvas.height;
+const subWidth = width / gl.canvas.width;
+const subHeight = height / gl.canvas.height;
 
 // make a frustum for that 1 pixel
 const projectionMatrix = m4.frustum(

webgl/webgl-picking-w-gpu-1pixel-w-texture.html

@@ -316,8 +316,8 @@
 
       const subLeft = left + pixelX * width / gl.canvas.width;
       const subBottom = bottom + pixelY * height / gl.canvas.height;
-      const subWidth = 1 / gl.canvas.width;
-      const subHeight = 1 / gl.canvas.height;
+      const subWidth = width / gl.canvas.width;
+      const subHeight = height / gl.canvas.height;
 
       // make a frustum for that 1 pixel
       const projectionMatrix = m4.frustum(

webgl/webgl-picking-w-gpu-1pixel.html

@@ -282,8 +282,8 @@
 
       const subLeft = left + pixelX * width / gl.canvas.width;
       const subBottom = bottom + pixelY * height / gl.canvas.height;
-      const subWidth = 1 / gl.canvas.width;
-      const subHeight = 1 / gl.canvas.height;
+      const subWidth = width / gl.canvas.width;
+      const subHeight = height / gl.canvas.height;
 
       // make a frustum for that 1 pixel
       const projectionMatrix = m4.frustum(