/// Draws a fog colored box which is wider at the top
void pie_DrawFogBox(float left, float right, float front, float back, float height, float wider)
{
PIELIGHT fog_colour = pie_GetFogColour();
pie_SetTexturePage(TEXPAGE_NONE);
glColor4ub(fog_colour.byte.r,fog_colour.byte.g,fog_colour.byte.b,0xFF);
pie_SetRendMode(REND_OPAQUE);
glPushAttrib(GL_DEPTH_BUFFER_BIT | GL_ENABLE_BIT | GL_FOG_BIT);
// no use in updating the depth buffer
glDepthMask(GL_FALSE);
glDisable(GL_FOG);
glBegin(GL_QUAD_STRIP);
// Front
glVertex3f(-left, 0, front); // bottom left
glVertex3f(-left-wider, height, front+wider); // top left
glVertex3f( right, 0, front); // bottom right
glVertex3f( right+wider, height, front+wider); // top right
// Right
glVertex3f( right, 0,-back); // bottom r
glVertex3f( right+wider, height,-back-wider); // top r
// Back
glVertex3f(-left, 0, -back); // bottom right
glVertex3f(-left-wider, height, -back-wider); // top right
// Left
glVertex3f(-left, 0, front); // bottom r
glVertex3f(-left-wider, height, front+wider); // top r
glEnd();
glPopAttrib();
}
//
// pie_SetFogStatus(bool val)
//
// Toggle fog on and off for rendering objects inside or outside the 3D world
//
void pie_SetFogStatus(bool val)
{
float fog_colour[4];
if (rendStates.fogEnabled)
{
//fog enabled so toggle if required
if (rendStates.fog != val)
{
rendStates.fog = val;
if (rendStates.fog)
{
PIELIGHT fog = pie_GetFogColour();
fog_colour[0] = fog.byte.r / 255.0f;
fog_colour[1] = fog.byte.g / 255.0f;
fog_colour[2] = fog.byte.b / 255.0f;
fog_colour[3] = fog.byte.a / 255.0f;
glFogi(GL_FOG_MODE, GL_LINEAR);
glFogfv(GL_FOG_COLOR, fog_colour);
glFogf(GL_FOG_DENSITY, 0.35f);
glHint(GL_FOG_HINT, GL_DONT_CARE);
glEnable(GL_FOG);
}
else
{
glDisable(GL_FOG);
}
}
}
else
{
//fog disabled so turn it off if not off already
if (rendStates.fog != false)
{
rendStates.fog = false;
}
}
}