public Cube(GLWorld world, float left, float bottom, float back, float right, float top, float front)
super(world);
GLVertex leftBottomBack = addVertex(left, bottom, back);
GLVertex rightBottomBack = addVertex(right, bottom, back);
GLVertex leftTopBack = addVertex(left, top, back);
GLVertex rightTopBack = addVertex(right, top, back);
GLVertex leftBottomFront = addVertex(left, bottom, front);
GLVertex rightBottomFront = addVertex(right, bottom, front);
GLVertex leftTopFront = addVertex(left, top, front);
GLVertex rightTopFront = addVertex(right, top, front);
// vertices are added in a clockwise orientation (when viewed from the outside)
// bottom
addFace(new GLFace(leftBottomBack, leftBottomFront, rightBottomFront, rightBottomBack));
// front
addFace(new GLFace(leftBottomFront, leftTopFront, rightTopFront, rightBottomFront));
// left
addFace(new GLFace(leftBottomBack, leftTopBack, leftTopFront, leftBottomFront));
// right
addFace(new GLFace(rightBottomBack, rightBottomFront, rightTopFront, rightTopBack));
// back
addFace(new GLFace(leftBottomBack, rightBottomBack, rightTopBack, leftTopBack));
// top
addFace(new GLFace(leftTopBack, rightTopBack, rightTopFront, leftTopFront));
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