Class SpiderGL.Space.DepthRangeStack

The SpiderGL.Space.ViewportStack is a stack for viewport rectangles.

Defined in: space.js
Extends SpiderGL.Core.ObjectBase

Class Summary
Constructor Attributes	Constructor Name and Description
	SpiderGL.Space.DepthRangeStack(onChange) Creates a SpiderGL.Space.ViewportStack.

Field Summary
Field Attributes	Field Name and Description
<readonly>	range Gets a copy of the matrix at the top of the stack.
<readonly>	range$ Gets a reference to the matrix at the top of the stack.
<readonly>	size Gets the stack depth Initially, the stack contains an identity matrix, so its depth is one.
<readonly>	top Alias for #rect.
<readonly>	top$ Alias for #rect$.

Fields borrowed from class SpiderGL.Core.ObjectBase:: uid

Method Summary

Method Attributes	Method Name and Description
	inner(m) Post-multiplies the matrix at the top with the passed matrix The matrix a at the top will be replaced by a * m.
	load(m) Replaces the matrix at the top with a clone of the passed matrix.
	loadIdentity() Replaces the matrix at the top with an identity matrix.
	pop() Pops the stack.
	push() Pushes into the stack the range at its top.
	reset() Resets the stack.

Event Summary
Event Attributes	Event Name and Description
	onChange() Gets/Sets the callback invoked whenever the top rectangle changes.

Class Detail

SpiderGL.Space.DepthRangeStack(onChange)

Creates a SpiderGL.Space.ViewportStack. SpiderGL.Space.ViewportStack is a stack for viewport rectangles, specified with lower and left coordinates, width and height. Initially, the stack depth is one and contains a rectangle with lower-eft coordinates equal to zero and width and height equal to one, that is, the array [0, 0, 1, 1]. Every method or getter to access the top rectangle returns a copy of the internal rectangle. For performance reasons, variants of the above accessors (having the same identifier with the postfix "$" appended) that return a reference to the internal rectangle are also present.

var s  = new SpiderGL.Space.ViewportStack();
var dw = width  / nx;
var dh = height / ny;
s.load(x, y, width, height);
for (var x=0; x
						
					
				
					
						
							Parameters:
							
								
									{function(this)}  onChange
									Optional
								
								A callback function called whenever the stack is modified.
							
						
					
					
					
						
							
							
							
							
							
							
							
							
							
							
							
								See:
								
									reset
								
									SpiderGL.Space.TransformationStack

Field Detail

<readonly> {array} range

Gets a copy of the matrix at the top of the stack. Initially, the stack has depth one and contains an identity matrix.

See:: #matrix$

<readonly> {array} range$

Gets a reference to the matrix at the top of the stack. The returned array MUST NOT be changed. Initially, the stack has depth one and contains an identity matrix.

See:: #matrix

<readonly> {number} size

Gets the stack depth Initially, the stack contains an identity matrix, so its depth is one.

<readonly> {array} top

Alias for #rect.

See:: #top$; #rect

<readonly> {array} top$

Alias for #rect$.

See:: #top; #rect$

Method Detail

inner(m)

Post-multiplies the matrix at the top with the passed matrix The matrix a at the top will be replaced by a * m.

Parameters:

{array} m

The matrix to post-multiply.

See:

#load
load(m)

Replaces the matrix at the top with a clone of the passed matrix.

Parameters:

{array} m

The matrix to push on the stack. The matrix actually pushed is a clone of m.

See:

#loadIdentity

#multiply

SpiderGL.Math.Mat4.dup
loadIdentity()

Replaces the matrix at the top with an identity matrix.

See:

#load

#multiply

SpiderGL.Math.Mat4.identity

SpiderGL.Math.Mat4.identity$
pop()

Pops the stack. After a pop operation, the stack depth is decremented by one. Nothing is done if the stack has only one element.

See:

#push
push()

Pushes into the stack the range at its top. After a push operation, the stack depth is incremented by one and the two rectangle at its top are identical. There is no limit on the depth the stack can reach.

See:

#pop
reset()

Resets the stack. The stack is reset to its initial state, that is, a stack with depth one containing the identity rectangle, that is, [0, 0, 1, 1].

See:

#loadIdentity

Event Detail

onChange()