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csRenderContext Class Reference

This structure keeps track of the current render context. More...

#include <rview.h>

List of all members.

Public Attributes

iCamera* icamera

The current camera.

iClipper2D* iview

The 2D polygon describing how everything drawn inside should be clipped.

csRenderContextFrustum* iview_frustum

The frustum corresponding with iview.

iPolygon3D* portal_polygon

The portal polygon (or NULL if the first sector).

iSector* previous_sector

The previous sector (or NULL if the first sector).

iSector* this_sector

This sector.

csPlane3 clip_plane

This variable holds the plane of the portal through which the camera is looking.

bool do_clip_plane

If true then we clip all objects to 'clip_plane'. More...

bool do_clip_frustum

If true then we have to clip all objects to the portal frustum (either in 2D or 3D). More...

csFogInfo* fog_info

Every fogged sector we encountered results in an extra structure in the following list. More...

bool added_fog_info

If the following variable is true then a fog_info was added in this recursion level.

int draw_rec_level

A number indicating the recursion level we are in. More...

Friends

class csRenderView

Detailed Description

This structure keeps track of the current render context.

It is used by iRenderView. When recursing through a portal a new render context will be created and set in place of the old one.

Member Data Documentation

bool csRenderContext::do_clip_frustum

If true then we have to clip all objects to the portal frustum (either in 2D or 3D).
Normally this is not needed but some portals require this. If do_clip_plane is true then the value of this field is also implied to be true. The top-level portal should set do_clip_frustum to true in order for all geometry to be correctly clipped to screen boundaries.

bool csRenderContext::do_clip_plane

If true then we clip all objects to 'clip_plane'.
In principle one should always clip to 'clip_plane'. However, in many cases this is not required because portals mostly arrive in at the boundaries of a sector so there can actually be no objects after the portal plane. But it is possible that portals arive somewhere in the middle of a sector (for example with BSP sectors or with Things containing portals). In that case this variable will be set to true and clipping to 'clip_plane' is required.

int csRenderContext::draw_rec_level

A number indicating the recursion level we are in.
Starts with 0. Whenever the engine goes through a portal this number increases. Returning from a portal decreases the number again.

csFogInfo * csRenderContext::fog_info

Every fogged sector we encountered results in an extra structure in the following list.
This is only used if we are doing vertex based fog.

The documentation for this class was generated from the following file:

iengine/rview.h