OpenGL

开发平台：
Windows_Unix

Intro.cpp：源码内容
							//
// a64ki
// Copyright (c) 2002 Henrik Carlgren
// http://ziruz.cjb.net
// ziruz@hotpop.com
//
//
// INCLUDE FILES
//
#include "intro.h"
#include "particle.h"
#include "texture.h"
#include "misc.h"
#include <windows.h>
#include <glgl.h>
//
// GLOBAL VARIABLES
//
const int particleCount = 2048;
VECTOR targetPosition;
VECTOR targetVelocity;
VECTOR targetImpulse;
PARTICLE particle[particleCount];
extern GLuint texture[TEXTURE_COUNT];
//
// FUNCTION: introStartup
//
void introStartup(void)
{
	//
	// PARTICLE SYSTEM
	//
	targetVelocity.x = 0.0f;
	
	targetVelocity.y = -0.002f;
	targetVelocity.z = 0.0f;
	for(int i = 0; i < particleCount; i++)
	{
		particle[i].targetPosition = &targetPosition;
		particle[i].targetVelocity = &targetVelocity;
		particle[i].targetImpulse = &targetImpulse;
		particle[i].ageRangeMinimum = 1000;
		particle[i].ageRangeMaximum = 2000;
		particle[i].color.x = 1.0f; // red
		particle[i].color.y = 0.68f; // green
		particle[i].color.z = 0.32f; // blue
		particle[i].birth();
	}
	generateTextures();
}
//
// FUNCTION: introCleanup
//
void introCleanup(void)
{
}
//
// FUNCTION: introStartup
//
void introCycle(long double time, long double delta)
{
	float particleSize = 0.16f;
	int particleUsage = particleCount;
	//
	// PRE
	//
	glClear(GL_DEPTH_BUFFER_BIT);
	//
	// BACKGROUND
	//
	ortho();
	glMatrixMode(GL_TEXTURE);
	glPushMatrix();
	glTranslatef((float)time*-0.0001f, 0.0f, 0.0f);
	glRotatef((float)time*-0.01f, 1.0f, 0.0f, 0.0f);
	glRotatef((float)time*-0.02f, 0.0f, 1.0f, 0.0f);
	glRotatef((float)time*-0.03f, 0.0f, 0.0f, 1.0f);
	
	glEnable(GL_BLEND);
		
	glDisable(GL_DEPTH_TEST);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_TEXTURE_2D);
	
	glBindTexture(GL_TEXTURE_2D, texture[TEXTURE_BG1]);
	glColor4f(0.5f, 0.5f, 1.0f, (float)delta*0.01f);
	glBegin(GL_QUADS);
		glTexCoord2i(0, 0);
		glVertex2i(0, 0);
		glTexCoord2i(1, 0);
		glVertex2i(800, 0);
		glTexCoord2i(1, 1);
		glVertex2i(800, 600);
		glTexCoord2i(0, 1);
		glVertex2i(0, 600);
	glEnd();
	glPopMatrix();
	glMatrixMode(GL_MODELVIEW);
	//
	// PARTICLE SYSTEM
	//
	float timeScale = 0.005f;
	targetPosition.x = 2.0f * cosf((float)time * timeScale);
	targetPosition.y = sinf((float)time * timeScale) + 0.8f;
	targetPosition.z = cosf((float)time * (timeScale / 2.0f)) - 1.0f;
	targetImpulse.x = 0.005f * sinf((float)time * timeScale);
	targetImpulse.y = 0.005f * -cosf((float)time * timeScale);
	targetImpulse.z = 0.005f * (sinf((float)time * (timeScale / 2.0f)));
	perspective();
	glTranslatef(0.0f,0.0f,-2.75f);
	
	glEnable(GL_BLEND);
		
	glDisable(GL_DEPTH_TEST);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE);
	glEnable(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE_2D, texture[TEXTURE_PARTICLE]);
	
	for(int i = 0; i < particleUsage; i++)
	{
		particle[i].update(delta);
		glColor4f(	particle[i].color.x-0.16f,
					particle[i].color.y-0.16f,
					particle[i].color.z-0.16f,
					(1.0f - (float)particle[i].currentAge/(float)particle[i].maximumAge)*0.1f*(float)delta);
		
		glBegin(GL_QUADS);
			glTexCoord2d(0,0);
			glVertex3f(	particle[i].position.x - particleSize,
						particle[i].position.y - particleSize,
						particle[i].position.z);
			glTexCoord2d(1,0);
			glVertex3f( particle[i].position.x + particleSize,
						particle[i].position.y - particleSize,
						particle[i].position.z);
			glTexCoord2d(1,1);
			glVertex3f(	particle[i].position.x + particleSize,
						particle[i].position.y + particleSize,
						particle[i].position.z);
			glTexCoord2d(0,1);
			glVertex3f( particle[i].position.x - particleSize,
						particle[i].position.y + particleSize,
						particle[i].position.z);
		glEnd();
	
	}
	//
	// SOFT WIDESCREEN
	//
	
	ortho();
	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
		
	glDisable(GL_DEPTH_TEST);
	glDisable(GL_TEXTURE_2D);
	
	glBegin(GL_QUADS);
		glColor4f(0.0f, 0.0f, 0.0f, 0.1f*(float)delta);
		glVertex2d(0, 0);
		glVertex2d(800, 0);
		glColor4f(0.0f, 0.0f, 0.0f, 0.0);
		glVertex2d(800, 100);
		glVertex2d(0, 100);
		//
		glVertex2d(0, 500);
		glVertex2d(800, 500);
		glColor4f(0.0f, 0.0f, 0.0f, 0.1f*(float)delta);
		glVertex2d(800, 600);
		glVertex2d(0, 600);
	glEnd();
	//
	// FADEOUT
	//
	if(time > 22500.0)
	{
		fadeOut(2500.0, time-22500.0);
	}
	//
	// END
	//
	SwapBuffers(wglGetCurrentDC());
}

						