Viewing Volume Functions

Functions
void	dglSetViewport (const RectI &aViewPort)
	sets the viewport for the window
void	dglGetViewport (RectI *outViewport)
	gets the current viewport of the window
void	dglSetFrustum (F64 left, F64 right, F64 bottom, F64 top, F64 nearDist, F64 farDist, bool ortho=false)
void	dglGetFrustum (F64 *left, F64 *right, F64 *bottom, F64 *top, F64 *nearDist, F64 *farDist)
bool	dglIsOrtho ()
	returns whether or not the coordinate system is orthographic (if it is not projected)
void	dglSetClipRect (const RectI &clipRect)
const RectI &	dglGetClipRect ()

Detailed Description

These functions set up the view cube of the window.

Function Documentation

dglGetClipRect()

const RectI & dglGetClipRect

(

)

Gets the last clip rect specified by a call to dglSetClipRect

See also

dglSetClipRect

dglGetFrustum()

void dglGetFrustum	(	F64 *	left,
		F64 *	right,
		F64 *	bottom,
		F64 *	top,
		F64 *	nearDist,
		F64 *	farDist )

Returns the parameters for the current viewing frustrum

See also

dglSetFrustrum

dglGetViewport()

void dglGetViewport

(

RectI *

outViewport

)

gets the current viewport of the window

dglIsOrtho()

bool dglIsOrtho

(

)

returns whether or not the coordinate system is orthographic (if it is not projected)

dglSetClipRect()

void dglSetClipRect

(

const RectI &

clipRect

)

Sets up an orthographical viewport and clipping region. This is best used for guis

Parameters

clipRect

The bounds of the coordinate system

dglSetFrustum()

void dglSetFrustum	(	F64	left,
		F64	right,
		F64	bottom,
		F64	top,
		F64	nearDist,
		F64	farDist,
		bool	ortho = false )

Sets the viewing frustrum. This effectively creates the view volume and sets up the 6 clipping planes (near, far, left, right, top, bottom)

Parameters

left	This is the position of the left vertical clipping plane
right	This is the position of the right vertical clipping plane
top	This is the position of the top horizontal clipping plane
bottom	This is the position of the bottom horizontal clipping plane
nearDist	This is the distance between the eye and the near clipping plane
farDist	This is the distance between the eye and the far clipping plane
ortho	(optional, default is false) If left false, calling this function will create a projection viewing volume. If true, it will be orthographic

dglSetViewport()

void dglSetViewport

(

const RectI &

aViewPort

)

sets the viewport for the window