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POvec3.unproject() mouse collision problems
 

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  1. POvec3.unproject() mouse collision problems
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    <pre><code>var fNearZ = -100.0; var farZ = 100.0; var fZoom = 10.0; var iR = this.iWidth/fZoom; var iL = (this.iWidth/fZoom)*(-1); var iT = this.iHeight/fZoom; var iB = (this.iHeight/fZoom)*(-1); var pMatrix = new mat4.ortho(iL, iR, iB, iT, fNearZ, farZ); var mvMatrix = new mat4.create(); mat4.identity(mvMatrix); zI.debug(mat4.str(mvMatrix),{'grp':'mv_before','style':'color:#060;'}); mat4.translate(mvMatrix, [0.0, 0.0, -50.0]); mat4.scale(mvMatrix, [3, 3, 3]); zI.debug(vec3.unproject([ parseFloat(this.pLastMouse.x-this.iLeft), parseFloat(this.pLastMouse.y-this.iTop), 0 ], mvMatrix, pMatrix, [ 0, 0, this.iWidth, this.iHeight ]),{'grp':'dest____','style':'color:#00F;'}); this.setMatrices(pMatrix, mvMatrix); //After this line, buffers will be set </code></pre> <p><img src="https://i.stack.imgur.com/au2ac.png" alt="Screen of 16x16 Planes with 0.1 offset between"> SCREEN URL: <a href="https://i.stack.imgur.com/au2ac.png" rel="nofollow noreferrer">http://i.stack.imgur.com/au2ac.png</a></p> <p>Today I've tried to realize my mouse-collision with the new version of gl-matrix, providing vec3.unproject. What I want is to get the z-world-coordinate of the mouse-position. As you can see on the Screenshot, the x and y coordinates are ok, but the z-coordinate is always 50, no matter where the cursor befinds.</p> <p>Each of the planes is 1.0x1.0 with 0.1 space between.</p> <p>When I add rotation or translation on the Y-Axis, I'm receiving wrong(?) x- and y- coordinates from unproject. I think the way I handle mvMatrix and pMatrix is wrong. Can anyone please help me?</p> <p><strong>EDIT</strong> Without using .translate() and .scale() functions I'm getting the correct values of zNear and zFar right now, still don't know if the coordinates are correct, when I apply these functions to the modelview-matrix. What's still missing is the intersection-calculation.</p> <p><strong>Link to my source:</strong> <a href="http://jsfiddle.net/matthoz/vucAq/" rel="nofollow noreferrer">http://jsfiddle.net/matthoz/vucAq/</a></p>
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    1. COI should mention that the unproject function in glMatrix is very new and has not undergone a lot of rigorous testing across multiple scenarios yet. It's entirely possible that I goofed something up. Would it be possible to post your source somewhere so I can cross check it?
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    2. COhttp://jsfiddle.net/matthoz/vucAq/ <- Please do not laugh at me ;) - Texture doesn't work on jsfiddle. But i can tell you, your code works fine.
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