public static ConvexSurface loadCylinder(int sides, double height, double radius) {
ConvexSurface surface = new ConvexSurface();
surface.faces = new Face[sides + 2];
double twoPI = 2 * 3.1415926535897932384626433832795;
double alpha, theta;
for (int i = 0; i < sides; i++) {
alpha = i * (twoPI / sides);
theta = (i + 1) * (twoPI / sides);
double[] face = {
radius * Math.cos(alpha),
-height / 2,
radius * Math.sin(alpha),
radius * Math.cos(alpha),
height / 2,
radius * Math.sin(alpha),
radius * Math.cos(theta),
height / 2,
radius * Math.sin(theta),
radius * Math.cos(theta),
-height / 2,
radius * Math.sin(theta),
};
surface.faces[i] = new Face(face, 4);
}
double[] top = new double[sides * 3];
double[] bottom = new double[sides * 3];
for (int i = 0; i < sides; i++) {
alpha = i * (twoPI / sides);
top[i * 3 + 0] = radius * Math.cos(alpha);
top[i * 3 + 1] = height / 2;
top[i * 3 + 2] = radius * Math.sin(alpha);
bottom[i * 3 + 0] = radius * Math.cos(alpha);
bottom[i * 3 + 1] = -height / 2;
bottom[i * 3 + 2] = radius * Math.sin(alpha);
}
surface.faces[sides + 0] = new Face(top, sides);
surface.faces[sides + 1] = new Face(bottom, sides);
surface.SURFACE_TYPE = ConvexSurface.CYLINDER;
surface.radius = (float) radius;
surface.height = (float) height;
surface.breakFaces();
surface.loadEdgeIndexing();
surface.loadPointIndexing();
return surface;
}
public static ConvexSurface loadOctahedron() {
double[] face1 = {0, 1, 0, 1, 0, 0, 0, 0, -1};
double[] face2 = {0, 1, 0, 0, 0, -1, -1, 0, 0};
double[] face3 = {0, 1, 0, -1, 0, 0, 0, 0, 1};
double[] face4 = {0, 1, 0, 0, 0, 1, 1, 0, 0};
double[] face5 = {0, -1, 0, 0, 0, -1, 1, 0, 0};
double[] face6 = {0, -1, 0, -1, 0, 0, 0, 0, -1};
double[] face7 = {0, -1, 0, 0, 0, 1, -1, 0, 0};
double[] face8 = {0, -1, 0, 1, 0, 0, 0, 0, 1};
ConvexSurface surface = new ConvexSurface();
surface.faces = new Face[8];
surface.faces[0] = new Face(face1, 3);
surface.faces[1] = new Face(face2, 3);
surface.faces[2] = new Face(face3, 3);
surface.faces[3] = new Face(face4, 3);
surface.faces[4] = new Face(face5, 3);
surface.faces[5] = new Face(face6, 3);
surface.faces[6] = new Face(face7, 3);
surface.faces[7] = new Face(face8, 3);
surface.SURFACE_TYPE = ConvexSurface.ABSTRACT;
surface.breakFaces();
surface.loadEdgeIndexing();
surface.loadPointIndexing();
return surface;
}
public static ConvexSurface loadSphere(int slices, int stacks, double radius) {
ConvexSurface surface = new ConvexSurface();
surface.faces = new Face[slices * stacks];
double twoPI = 2 * 3.1415926535897932384626433832795;
double thetaA, phiA, thetaB, phiB;
/*
r = [0, infinity)
theta = [0, 2*pi)
phi = [0, pi]
x = r*Math.cos(theta)*Math.sin(phi)
y = r*Math.cos(phi)
z = r*Math.sin(theta)*Math.sin(phi)
*/
for (int i = 0; i < stacks; i++) {
for (int j = 0; j < slices; j++) {
thetaA = j * (twoPI / slices);
thetaB = (j + 1) * (twoPI / slices);
phiA = i * (twoPI / 2 / stacks);
phiB = (i + 1) * (twoPI / 2 / stacks);
double[] face = {
radius * Math.cos(thetaA) * Math.sin(phiA),
radius * Math.cos(phiA),
radius * Math.sin(thetaA) * Math.sin(phiA),
radius * Math.cos(thetaA) * Math.sin(phiB),
radius * Math.cos(phiB),
radius * Math.sin(thetaA) * Math.sin(phiB),
radius * Math.cos(thetaB) * Math.sin(phiB),
radius * Math.cos(phiB),
radius * Math.sin(thetaB) * Math.sin(phiB),
radius * Math.cos(thetaB) * Math.sin(phiA),
radius * Math.cos(phiA),
radius * Math.sin(thetaB) * Math.sin(phiA)
};
surface.faces[i * slices + j] = new Face(face, 4);
}
}
surface.SURFACE_TYPE = ConvexSurface.SPHERE;
surface.radius = (float) radius;
surface.breakFaces();
surface.loadEdgeIndexing();
surface.loadPointIndexing();
return surface;
}
public static ConvexSurface loadCube(double scaleX, double scaleY, double scaleZ) {
double r = 0.5;
double[] face1 = {
r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
-r * scaleZ,
r * scaleX,
r * scaleY,
-r * scaleZ
}; // Top
double[] face2 = {
r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
-r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
r * scaleZ
}; // Front
double[] face3 = {
r * scaleX,
r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
-r * scaleZ,
r * scaleX,
r * scaleY,
-r * scaleZ
}; // Right
r = -0.5;
double[] face4 = {
r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
-r * scaleZ,
r * scaleX,
r * scaleY,
-r * scaleZ
}; // Top
double[] face5 = {
r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
-r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
r * scaleZ
}; // Front
double[] face6 = {
r * scaleX,
r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
-r * scaleZ,
r * scaleX,
r * scaleY,
-r * scaleZ
}; // Right
ConvexSurface surface = new ConvexSurface();
surface.faces = new Face[6];
surface.faces[0] = new Face(face1, 4);
surface.faces[1] = new Face(face2, 4);
surface.faces[2] = new Face(face3, 4);
surface.faces[3] = new Face(face4, 4);
surface.faces[4] = new Face(face5, 4);
surface.faces[5] = new Face(face6, 4);
surface.SURFACE_TYPE = ConvexSurface.CUBE;
surface.width = (float) scaleX;
surface.height = (float) scaleX;
surface.length = (float) scaleZ;
surface.breakFaces();
surface.loadEdgeIndexing();
surface.loadPointIndexing();
return surface;
}
public static ConvexSurface loadPrism(
double scaleX,
double scaleY,
double scaleZ,
double frontLeft,
double frontRight,
double backLeft,
double backRight) {
double r = 0.5;
double[] face1 = {
-r * scaleX,
r * scaleY + frontLeft,
r * scaleZ,
-r * scaleX,
r * scaleY + backLeft,
-r * scaleZ,
r * scaleX,
r * scaleY + backRight,
-r * scaleZ
}; // Top1
double[] face2 = {
r * scaleX,
r * scaleY + frontRight,
r * scaleZ,
-r * scaleX,
r * scaleY + backLeft,
-r * scaleZ,
r * scaleX,
r * scaleY + backRight,
-r * scaleZ
}; // Top2
double[] face3 = {
r * scaleX,
r * scaleY + frontRight,
r * scaleZ,
-r * scaleX,
r * scaleY + frontLeft,
r * scaleZ,
r * scaleX,
r * scaleY + backRight,
-r * scaleZ
}; // Top3
double[] face4 = {
r * scaleX,
r * scaleY + frontRight,
r * scaleZ,
-r * scaleX,
r * scaleY + frontLeft,
r * scaleZ,
-r * scaleX,
r * scaleY + backLeft,
-r * scaleZ
}; // Top4
double[] face5 = {
r * scaleX,
r * scaleY + frontRight,
r * scaleZ,
-r * scaleX,
r * scaleY + frontLeft,
r * scaleZ,
-r * scaleX,
-r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
r * scaleZ
}; // Front
double[] face6 = {
r * scaleX,
r * scaleY + frontRight,
r * scaleZ,
r * scaleX,
-r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY,
-r * scaleZ,
r * scaleX,
r * scaleY + backRight,
-r * scaleZ
}; // Right
r = -0.5;
double[] face7 = {
r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
-r * scaleZ,
r * scaleX,
r * scaleY,
-r * scaleZ
}; // bottom
double[] face8 = {
r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
r * scaleY,
r * scaleZ,
-r * scaleX,
-r * scaleY + backRight,
r * scaleZ,
r * scaleX,
-r * scaleY + backLeft,
r * scaleZ
}; // Back
double[] face9 = {
r * scaleX,
r * scaleY,
r * scaleZ,
r * scaleX,
-r * scaleY + backLeft,
r * scaleZ,
r * scaleX,
-r * scaleY + frontLeft,
-r * scaleZ,
r * scaleX,
r * scaleY,
-r * scaleZ
}; // Left
ConvexSurface surface = new ConvexSurface();
surface.faces = new Face[9];
surface.faces[0] = new Face(face1, 3);
surface.faces[1] = new Face(face2, 3);
surface.faces[2] = new Face(face3, 3);
surface.faces[3] = new Face(face4, 3);
surface.faces[4] = new Face(face5, 4);
surface.faces[5] = new Face(face6, 4);
surface.faces[6] = new Face(face7, 4);
surface.faces[7] = new Face(face8, 4);
surface.faces[8] = new Face(face9, 4);
surface.SURFACE_TYPE = ConvexSurface.CUBE;
surface.width = (float) scaleX;
surface.height = (float) scaleX;
surface.length = (float) scaleZ;
surface.breakFaces();
surface.loadEdgeIndexing();
surface.loadPointIndexing();
return surface;
}
