gl_fog.cpp File Reference

#include "gfxlib.h"
#include "gl_globals.h"

Go to the source code of this file.

Classes
struct	_GFXFogState

Functions
void	GFXFogMode (const FOGMODE fog)
void	GFXFogDensity (const float fogdensity)
void	GFXFogLimits (const float fognear, const float fogfar)
void	GFXFogColor (GFXColor c)
void	GFXFogIndex (const int index)

Variables
static struct _GFXFogState	GFXFogState

Function Documentation

void GFXFogColor

(

GFXColor

c)

Definition at line 69 of file gl_fog.cpp.

References GFXColor::a, GFXColor::b, _GFXFogState::c, c, GFXColor::g, GFXFogState, and GFXColor::r.

Referenced by GameNebula::SetFogState().

{
    if (c.r != GFXFogState.c.r || c.g != GFXFogState.c.g || c.b != GFXFogState.c.b || c.a != GFXFogState.c.a) {
        glFogfv( GL_FOG_COLOR, &c.r );
        GFXFogState.c = c;
    }
}

void GFXFogDensity

(

const float

fogdensity)

Definition at line 51 of file gl_fog.cpp.

References _GFXFogState::density, and GFXFogState.

Referenced by GameNebula::SetFogState().

{
    if (fogdensity != GFXFogState.density) {
        glFogf( GL_FOG_DENSITY, fogdensity );
        GFXFogState.density = fogdensity;
    }
}

void GFXFogIndex

(

const int

index)

Definition at line 77 of file gl_fog.cpp.

References GFXFogState, _GFXFogState::index, and index.

Referenced by GameNebula::SetFogState().

{
    if (GFXFogState.index != index) {
        glFogi( GL_FOG_INDEX, index );
        GFXFogState.index = index;
    }
}

void GFXFogLimits	(	const float	fognear,
		const float	fogfar
	)

Definition at line 59 of file gl_fog.cpp.

References _GFXFogState::ffar, GFXFogState, and _GFXFogState::nnear.

Referenced by GameNebula::SetFogState().

{
    if (GFXFogState.nnear != fognear || GFXFogState.ffar != fogfar) {
        GFXFogState.nnear = fognear;
        GFXFogState.ffar  = fogfar;
        glFogf( GL_FOG_START, fognear );
        glFogf( GL_FOG_END, fogfar );
    }
}

void GFXFogMode

(

const FOGMODE

fog)

Definition at line 23 of file gl_fog.cpp.

References _GFXFogState::curmode, _GFXFogState::enabled, FOG_EXP, FOG_EXP2, FOG_LINEAR, FOG_OFF, and GFXFogState.

Referenced by GameStarSystem::Draw(), Mesh::DrawNow(), Animation::ProcessDrawQueue(), GameNebula::SetFogState(), and SetupFogState().

{
    if (GFXFogState.curmode != fog || !GFXFogState.enabled) {
        switch (fog)
        {
        case FOG_OFF:
            if (!GFXFogState.enabled)
                return;
            glDisable( GL_FOG );
            GFXFogState.enabled = false;
            return;
        case FOG_EXP:
            glFogi( GL_FOG_MODE, GL_EXP );
            break;
        case FOG_EXP2:
            glFogi( GL_FOG_MODE, GL_EXP2 );
            break;
        case FOG_LINEAR:
            glFogi( GL_FOG_MODE, GL_LINEAR );
            break;
        }
    }
    if (!GFXFogState.enabled) glEnable( GL_FOG );
    GFXFogState.curmode = fog;
    GFXFogState.enabled = true;
    //glHint (GL_FOG_HINT,GL_NICEST );
}

Variable Documentation

struct _GFXFogState GFXFogState

static

Referenced by GFXFogColor(), GFXFogDensity(), GFXFogIndex(), GFXFogLimits(), and GFXFogMode().