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Redline/source/sky.cpp
maride 02061d74c2 Original 1.0.5 code 
(as received from Jonas Echterhoff)
2016-04-02 14:43:55 +02:00

308 lines
12 KiB
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//sky.cpp
//draws the background skybox
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#include <OpenGL/glext.h>
#include "vectors.h"
#include "textures.h"
#include "fileio.h"
#include "renderframe.h"
#include "screen.h"
#include "environment.h"
#include "gameinitexit.h"
#include "entities.h"
#include "gameframe.h"
#include "random.h"
#include "config.h"
#define kSkyDistance 7000.0
#define kBackgroundDistance 5000.0
#define kMapScale 1500.0
int gLightning=false;
//draws the background skybox
void SkyRender()
{
glPushAttrib(GL_FOG_BIT+GL_LIGHTING_BIT+GL_DEPTH_BUFFER_BIT+GL_COLOR_BUFFER_BIT+GL_TRANSFORM_BIT);
glDisable(GL_FOG);
glDisable(GL_LIGHTING);
glDepthFunc(GL_ALWAYS);
SetupWorldTranslation();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity(); // Reset The Projection Matrix
float aspect=(float)gConfig->screenXSize/(float)gConfig->screenYSize;
gluPerspective(gFOVY*(360.0/(2*PI)),aspect,0.1f,15000.0f); // Calculate The Aspect Ratio Of The Window
//==========draw skybox===============
if(gMapEnv)
if(gMapEnv->sky0)
TexturesSelectTex(gMapEnv->sky0);
else
TexturesSelectTex(gEnvironment->sky0);
else
TexturesSelectTex(gEnvironment->sky0);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(-kSkyDistance,kSkyDistance,kSkyDistance);
glTexCoord2f(1.0f,0.0f);
glVertex3f(kSkyDistance,kSkyDistance,kSkyDistance);
glTexCoord2f(1.0f,1.0f);
glVertex3f(kSkyDistance,-kSkyDistance,kSkyDistance);
glTexCoord2f(0.0f,1.0f);
glVertex3f(-kSkyDistance,-kSkyDistance,kSkyDistance);
glEnd();
if(gMapEnv)
if(gMapEnv->sky270)
TexturesSelectTex(gMapEnv->sky270);
else
TexturesSelectTex(gEnvironment->sky270);
else
TexturesSelectTex(gEnvironment->sky270);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(-kSkyDistance,kSkyDistance,-kSkyDistance);
glTexCoord2f(1.0f,0.0f);
glVertex3f(-kSkyDistance,kSkyDistance,kSkyDistance);
glTexCoord2f(1.0f,1.0f);
glVertex3f(-kSkyDistance,-kSkyDistance,kSkyDistance);
glTexCoord2f(0.0f,1.0f);
glVertex3f(-kSkyDistance,-kSkyDistance,-kSkyDistance);
glEnd();
if(gMapEnv)
if(gMapEnv->sky180)
TexturesSelectTex(gMapEnv->sky180);
else
TexturesSelectTex(gEnvironment->sky180);
else
TexturesSelectTex(gEnvironment->sky180);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(kSkyDistance,kSkyDistance,-kSkyDistance);
glTexCoord2f(1.0f,0.0f);
glVertex3f(-kSkyDistance,kSkyDistance,-kSkyDistance);
glTexCoord2f(1.0f,1.0f);
glVertex3f(-kSkyDistance,-kSkyDistance,-kSkyDistance);
glTexCoord2f(0.0f,1.0f);
glVertex3f(kSkyDistance,-kSkyDistance,-kSkyDistance);
glEnd();
if(gMapEnv)
if(gMapEnv->sky90)
TexturesSelectTex(gMapEnv->sky90);
else
TexturesSelectTex(gEnvironment->sky90);
else
TexturesSelectTex(gEnvironment->sky90);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(kSkyDistance,kSkyDistance,kSkyDistance);
glTexCoord2f(1.0f,0.0f);
glVertex3f(kSkyDistance,kSkyDistance,-kSkyDistance);
glTexCoord2f(1.0f,1.0f);
glVertex3f(kSkyDistance,-kSkyDistance,-kSkyDistance);
glTexCoord2f(0.0f,1.0f);
glVertex3f(kSkyDistance,-kSkyDistance,kSkyDistance);
glEnd();
if(gMapEnv)
if(gMapEnv->skytop)
TexturesSelectTex(gMapEnv->skytop);
else
TexturesSelectTex(gEnvironment->skytop);
else
TexturesSelectTex(gEnvironment->skytop);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(-kSkyDistance,kSkyDistance,-kSkyDistance);
glTexCoord2f(1.0f,0.0f);
glVertex3f(kSkyDistance,kSkyDistance,-kSkyDistance);
glTexCoord2f(1.0f,1.0f);
glVertex3f(kSkyDistance,kSkyDistance,kSkyDistance);
glTexCoord2f(0.0f,1.0f);
glVertex3f(-kSkyDistance,kSkyDistance,kSkyDistance);
glEnd();
if(gMapEnv)
if(gMapEnv->skybot)
TexturesSelectTex(gMapEnv->skybot);
else
TexturesSelectTex(gEnvironment->skybot);
else
TexturesSelectTex(gEnvironment->skybot);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(-kSkyDistance,-kSkyDistance,kSkyDistance);
glTexCoord2f(1.0f,0.0f);
glVertex3f(kSkyDistance,-kSkyDistance,kSkyDistance);
glTexCoord2f(1.0f,1.0f);
glVertex3f(kSkyDistance,-kSkyDistance,-kSkyDistance);
glTexCoord2f(0.0f,1.0f);
glVertex3f(-kSkyDistance,-kSkyDistance,-kSkyDistance);
glEnd();
glPopMatrix();
//=========draw lightning flashes=======
//is there lighning in this environment?
if(gEnvironment->flashIntensity>0)
//and is there a flash at the moment?
if(gLightning)
{
glPushAttrib(GL_DEPTH_BUFFER_BIT+GL_FOG_BIT+GL_TEXTURE_BIT+GL_CURRENT_BIT+GL_TRANSFORM_BIT);
gEnvironment->flashColor;
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glDisable(GL_TEXTURE_2D);
glDisable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
// glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glBlendFunc(GL_DST_ALPHA,GL_ONE);
//glEnable(GL_FOG);
//just draw a covering plane
glBegin(GL_TRIANGLE_STRIP);
glColor3fv(&(RandomFl(0,1)*gEnvironment->flashColor).x);
glVertex3f(-1.0f, 1.0f,-1.00f);
glColor3fv(&(RandomFl(0,1)*gEnvironment->flashColor).x);
glVertex3f(-1.0f,-1.0f,-1.00f);
glColor3fv(&(RandomFl(0,1)*gEnvironment->flashColor).x);
glVertex3f( 1.0f, 1.0f,-1.00f);
glColor3fv(&(RandomFl(0,1)*gEnvironment->flashColor).x);
glVertex3f( 1.0f,-1.0f,-1.00f);
glEnd();
glPopMatrix();
glPopAttrib();
}
glPopAttrib();
/* glPushMatrix();
glLoadIdentity(); // Reset The Projection Matrix
gluPerspective(gFOVY*(360.0/(2*PI)),aspect,0.1f,15000.0f); // Calculate The Aspect Ratio Of The Window
glEnable(GL_LIGHTING);
glNormal3f(0,1,0);
//==========draw background===============
//the background (mountains, for example) is as another box inside the skybox,
//which moves relative to the skybox as the camera moves, similar to paralax scrolling in 2d games.
/* tVector3 backgroundShift;
backgroundShift.x=-(gCameraEntity->pos.x/kMapScale);
backgroundShift.y=-(gCameraEntity->pos.y/kMapScale);
backgroundShift.z=-(gCameraEntity->pos.z/kMapScale);
if(fabs(backgroundShift.x)>1)backgroundShift.x=sign(backgroundShift.x);
if(fabs(backgroundShift.y)>1)backgroundShift.y=sign(backgroundShift.y);
if(fabs(backgroundShift.z)>1)backgroundShift.z=sign(backgroundShift.z);
backgroundShift=backgroundShift*(kSkyDistance-kBackgroundDistance);
TexturesSelectTex(gMapInfo->background0);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,0.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,1.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glTexCoord2f(0.0f,1.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glEnd();
TexturesSelectTex(gMapInfo->background270);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,0.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,1.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glTexCoord2f(0.0f,1.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glEnd();
TexturesSelectTex(gMapInfo->background180);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,0.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,1.0f);
glVertex3f(-kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glTexCoord2f(0.0f,1.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glEnd();
TexturesSelectTex(gMapInfo->background90);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,0.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glTexCoord2f(1.0f,1.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glTexCoord2f(0.0f,1.0f);
glVertex3f(kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glEnd();
glBegin(GL_QUADS);
glVertex3f(-kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glVertex3f(kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,kBackgroundDistance+backgroundShift.z);
glVertex3f(kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glVertex3f(-kBackgroundDistance+backgroundShift.x,-kBackgroundDistance+backgroundShift.y,-kBackgroundDistance+backgroundShift.z);
glEnd();
glPopMatrix();
glPopAttrib();*/
#ifdef __POLYCOUNT
gPolyCount+=20;
#endif
}
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