132fa5ebc0
view of the back ground. Also the screen resolution and the shadowmap resolution are no longer hard coded everywhere. They are defined in mainThread.java.
76 lines
1.4 KiB
Java
76 lines
1.4 KiB
Java
package core;
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//takes a pixel position from a rasterized polygon and find its 3D location in world space
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public class Turn2DTo3DFactory {
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public vector O, U, V, W, A, B, C;
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public vector location3D;
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public float X, Y;
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public void init(){
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O = new vector(0,0,0);
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U = new vector(0,0,0);
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V = new vector(0,0,0);
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W = new vector(0,0,0);
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A = new vector(0,0,0);
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B = new vector(0,0,0);
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C = new vector(0,0,0);
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location3D = new vector(0,0,0);
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}
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public vector get3DLocation(polygon3D poly, int x, int y){
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O.set(poly.origin);
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O.subtract(camera.position);
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O.rotate_XZ(camera.XZ_angle);
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O.rotate_YZ(camera.YZ_angle);
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U.set(poly.rightEnd);
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U.subtract(camera.position);
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U.rotate_XZ(camera.XZ_angle);
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U.rotate_YZ(camera.YZ_angle);
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V.set(poly.bottomEnd);
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V.subtract(camera.position);
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V.rotate_XZ(camera.XZ_angle);
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V.rotate_YZ(camera.YZ_angle);
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U.subtract(O);
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U.unit();
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V.subtract(O);
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V.unit();
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A.cross(V,O);
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B.cross(O,U);
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C.cross(U,V);
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W.set(x-mainThread.screen_width/2, -y + mainThread.screen_height/2, vector.Z_length);
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X = A.dot(W)/C.dot(W);
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Y = B.dot(W)/C.dot(W);
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O.set(poly.origin);
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U.set(poly.rightEnd);
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V.set(poly.bottomEnd);
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U.subtract(O);
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V.subtract(O);
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X/=(U.getLength());
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Y/=(V.getLength());
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location3D.set(O);
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location3D.add(U, X);
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location3D.add(V, Y);
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return location3D;
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}
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}
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