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spacetime/src.ui/opencog/spacetime/swing/vr/BigMesh.java

 

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package opencog.spacetime.swing.vr;

 

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import java.util.Arrays;

 

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import opencog.spacetime.geometry.QuadMeshFactory;

 

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import opencog.spacetime.space.IndexedFaceSet;

 

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public class BigMesh {

 

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        public static IndexedFaceSet bigMesh(int discretization, double cameraHeight, double size) {

 

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                int n = discretization;

 

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                QuadMeshFactory factory = new QuadMeshFactory();

 

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                factory.setULineCount(n);

 

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                factory.setVLineCount(n);

 

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                factory.setGenerateEdgesFromFaces(true);

 

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                factory.setGenerateTextureCoordinates(false);

 

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                double totalAngle = Math.atan(size/cameraHeight);

 

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                double dt = 2 * totalAngle/(n-1);

 

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                double[] normal = new double[]{0,0,-1};

 

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                double[][] normals = new double[n*n][];

 

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                Arrays.fill(normals, normal);

 

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                double[][][] coords = new double[n][n][3];

 

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                for (int i=0; i<n; i++) {

 

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                        double y = cameraHeight * Math.tan(-totalAngle + i * dt);

 

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                        for (int j=0; j<n; j++) {

 

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                                coords[i][j][0] = cameraHeight * Math.tan(-totalAngle + j * dt);

 

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                                coords[i][j][1] = y;

 

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                        }

 

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                }

 

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                double[][][] texCoords = new double[n][n][2];

 

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                for (int i=0; i<n; i++) {

 

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                        for (int j=0; j<n; j++) {

 

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                                texCoords[i][j][0] = coords[i][j][0];

 

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                                texCoords[i][j][1] = coords[i][j][1];

 

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                        }

 

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                }

 

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                factory.setVertexCoordinates(coords);

 

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                factory.setVertexNormals(normals);

 

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                factory.setVertexTextureCoordinates(texCoords);

 

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                factory.update();

 

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                return factory.getIndexedFaceSet();

 

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        }

 

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}

 

 

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