Difference between revisions of "Getting Worldspace Bounds"

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This method is formatted to return a bounding box in 6 floats, exactly as Mesh.getBounds() does, but whose min and max values are values in worldspace.
 
This method is formatted to return a bounding box in 6 floats, exactly as Mesh.getBounds() does, but whose min and max values are values in worldspace.
 
<pre>
 
<pre>
     public float[] getWorldSpaceBounds() {
+
     public float[] getWorldSpaceBounds(Object3D obj) {
float[] objectSpaceBounds = terrain.getMesh().getBoundingBox();
+
float[] objectSpaceBounds = obj.getMesh().getBoundingBox();
 
SimpleVector mins = new SimpleVector(objectSpaceBounds[0], objectSpaceBounds[2], objectSpaceBounds[4]);
 
SimpleVector mins = new SimpleVector(objectSpaceBounds[0], objectSpaceBounds[2], objectSpaceBounds[4]);
 
SimpleVector maxs = new SimpleVector(objectSpaceBounds[1], objectSpaceBounds[3], objectSpaceBounds[5]);
 
SimpleVector maxs = new SimpleVector(objectSpaceBounds[1], objectSpaceBounds[3], objectSpaceBounds[5]);
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p[0] = new SimpleVector(mins.x, mins.y, maxs.z); p[1] = new SimpleVector(mins.x, mins.y, mins.z); p[2] = new SimpleVector(maxs.x, mins.y, mins.z);
 
p[0] = new SimpleVector(mins.x, mins.y, maxs.z); p[1] = new SimpleVector(mins.x, mins.y, mins.z); p[2] = new SimpleVector(maxs.x, mins.y, mins.z);
 
p[3] = new SimpleVector(maxs.x, mins.y, maxs.z); p[4] = new SimpleVector(maxs.x, maxs.y, mins.z);
 
p[3] = new SimpleVector(maxs.x, mins.y, maxs.z); p[4] = new SimpleVector(maxs.x, maxs.y, mins.z);
p[5] = new SimpleVector(maxs.x, maxs.y, maxs.z); p[6] = new SimpleVector(mins.x, maxs.y, mins.z); p[7] = new SimpleVector(mins.x, maxs.x, maxs.z);
+
p[5] = new SimpleVector(maxs.x, maxs.y, maxs.z); p[6] = new SimpleVector(mins.x, maxs.y, mins.z); p[7] = new SimpleVector(mins.x, maxs.y, maxs.z);
 
float minX = Float.MAX_VALUE, minY = Float.MAX_VALUE, minZ = Float.MAX_VALUE, maxX = -Float.MAX_VALUE, maxY = -Float.MAX_VALUE, maxZ = -Float.MAX_VALUE;
 
float minX = Float.MAX_VALUE, minY = Float.MAX_VALUE, minZ = Float.MAX_VALUE, maxX = -Float.MAX_VALUE, maxY = -Float.MAX_VALUE, maxZ = -Float.MAX_VALUE;
 
for (int i = 0; i < 8; i++) {
 
for (int i = 0; i < 8; i++) {
    p[i].matMul(terrain.getWorldTransformation());
+
    p[i].matMul(obj.getWorldTransformation());
 
    if (p[i].x < minX)
 
    if (p[i].x < minX)
 
minX = p[i].x;
 
minX = p[i].x;

Latest revision as of 23:05, 5 March 2013

This method is formatted to return a bounding box in 6 floats, exactly as Mesh.getBounds() does, but whose min and max values are values in worldspace.

     public float[] getWorldSpaceBounds(Object3D obj) {
	float[] objectSpaceBounds = obj.getMesh().getBoundingBox();
	SimpleVector mins = new SimpleVector(objectSpaceBounds[0], objectSpaceBounds[2], objectSpaceBounds[4]);
	SimpleVector maxs = new SimpleVector(objectSpaceBounds[1], objectSpaceBounds[3], objectSpaceBounds[5]);
	SimpleVector[] p = new SimpleVector[8];
	p[0] = new SimpleVector(mins.x, mins.y, maxs.z); p[1] = new SimpleVector(mins.x, mins.y, mins.z); p[2] = new SimpleVector(maxs.x, mins.y, mins.z);
	p[3] = new SimpleVector(maxs.x, mins.y, maxs.z); p[4] = new SimpleVector(maxs.x, maxs.y, mins.z);
	p[5] = new SimpleVector(maxs.x, maxs.y, maxs.z); p[6] = new SimpleVector(mins.x, maxs.y, mins.z); p[7] = new SimpleVector(mins.x, maxs.y, maxs.z);
	float minX = Float.MAX_VALUE, minY = Float.MAX_VALUE, minZ = Float.MAX_VALUE, maxX = -Float.MAX_VALUE, maxY = -Float.MAX_VALUE, maxZ = -Float.MAX_VALUE;
	for (int i = 0; i < 8; i++) {
	     p[i].matMul(obj.getWorldTransformation());
	     if (p[i].x < minX)
		minX = p[i].x;
	     if (p[i].y < minY)
		minY = p[i].y;
	     if (p[i].z < minZ)
		minZ = p[i].z;
	     if (p[i].x > maxX)
		maxX = p[i].x;
	     if (p[i].y > maxY)
		maxY = p[i].y;
	     if (p[i].z > maxZ)
		maxZ = p[i].z;
	}
	float[] worldSpaceBounds = new float[6];
	worldSpaceBounds[0] = minX;
	worldSpaceBounds[2] = minY;
	worldSpaceBounds[4] = minZ;
	worldSpaceBounds[1] = maxX;
	worldSpaceBounds[3] = maxY;
	worldSpaceBounds[5] = maxZ;
	return worldSpaceBounds;
     }