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// Bullet.cpp: implementation of the CBullet class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "Bullet.h" 
#include "texture.h" 
#include "math.h" 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
CBullet::CBullet() 
{ 
	m_bulletType=M16; 
 
} 
CBullet::~CBullet() 
{ 
} 
bool CBullet::InitBullet(VERTEX  startPos,float rotx,float roty,NORMAL direction,unsigned int *texResource,int type) 
{ 
	m_pTexResource=texResource; 
	m_bulletType=type; 
    m_CurPos=startPos; 
	m_oldPos=startPos; 
	m_rotX=rotx; 
	m_rotY=roty; 
	m_rotZ=0; 
    m_direction = direction; 
    m_life=350; 
 
    switch(m_bulletType) 
	{ 
	case M16: 
    	m_Speed=3.0f; 
		break; 
	case RIFLE: 
    	m_Speed=3.0f; 
		break; 
	case ROCKET: 
//		m_rocket.InitParticle(startPos,m_pTexResource,BULLET_P,direction); 
    	m_Speed=2.0f; 
		break; 
	} 
 
	return true; 
} 
bool CBullet::InitBullet(VERTEX  startPos,float rotx,float roty,unsigned int *texResource,int type) 
{ 
	m_pTexResource=texResource; 
    NORMAL direction; 
    direction.nx=-cosf(rotx*0.0174533f)*sinf(roty*0.0174533f); 
    direction.ny=-sinf(rotx*0.0174533f); 
    direction.nz=-cosf(rotx*0.0174533f)*cosf(roty*0.0174533f); 
    InitBullet(startPos,rotx,roty,direction,m_pTexResource,type); 
	return true; 
} 
void CBullet::UpdateBullet() 
{ 
	m_oldPos=m_CurPos; 
	m_CurPos.xpos+=m_direction.nx*m_Speed; 
	m_CurPos.ypos+=m_direction.ny*m_Speed; 
	m_CurPos.zpos+=m_direction.nz*m_Speed; 
    if(m_cHmap.CollideCheck(m_oldPos,m_CurPos,2)) 
	{ 
		m_life=-1; 
	} 
    else  
	{ 
		if(m_bulletType==M16)DrawM16Bullet(); 
		if(m_bulletType==RIFLE)DrawRifleBullet(); 
		if(m_bulletType==ROCKET)DrawRocketBullet(); 
		m_life--; 
	} 
} 
 
void CBullet::DrawRifleBullet() 
{ 
	glEnable(GL_TEXTURE_2D); 
	glDisable(GL_CULL_FACE); 
 	glBindTexture(GL_TEXTURE_2D,m_pTexResource[0] );    
	glBlendFunc(GL_ONE,GL_ONE); 
	glEnable(GL_BLEND);	 
	float size=0.1f; 
    glPushMatrix();	 
	glTranslatef(m_CurPos.xpos,m_CurPos.ypos,m_CurPos.zpos); 
	glRotatef(m_rotY,  0.0f,1.0f,0.0f); 
	glRotatef(-m_rotX,  1.0f,0.0f,0.0f); 
 
	glBegin(GL_TRIANGLE_STRIP); 
	    glTexCoord2f(0,0); 
	    glVertex3f(-size,-size,0); 
	    glTexCoord2f(1,0); 
	    glVertex3f(size,-size,0);	     
	    glTexCoord2f(0,1); 
        glVertex3f(-size,size,0); 
	    glTexCoord2f(1,1); 
	    glVertex3f(size,size,0); 
	glEnd(); 
    glPopMatrix(); 
	glDisable(GL_BLEND); 
	glEnable(GL_CULL_FACE);	 
} 
void CBullet::DrawM16Bullet() 
{ 
	glDisable(GL_CULL_FACE); 
	glEnable(GL_TEXTURE_2D); 
 	glBindTexture(GL_TEXTURE_2D,m_pTexResource[0]  );     
 
	float size=0.05f; 
    glPushMatrix();	 
	glTranslatef(m_CurPos.xpos,m_CurPos.ypos,m_CurPos.zpos); 
	glRotatef(m_rotY,  0.0f,1.0f,0.0f); 
//	glRotatef(m_rotZ,  0.0f,1.0f,0.0f);	 
	glRotatef(-m_rotX,  1.0f,0.0f,0.0f); 
 
	glBegin(GL_TRIANGLE_FAN); 
	    glTexCoord2f(0,1); 
	    glVertex3f(0,0,-size*100); 
 
	    glTexCoord2f(0,0); 
	    glVertex3f(-size,0,0); 
	    glTexCoord2f(1,0); 
	    glVertex3f(size,0,0); 
	    glTexCoord2f(0,0); 
	    glVertex3f(0,size,0); 
	    glTexCoord2f(1,0); 
	    glVertex3f(-size,0,0); 
 
	glEnd(); 
    glPopMatrix(); 
	glEnable(GL_CULL_FACE); 
	glDisable(GL_BLEND); 
 
} 
void  CBullet::DrawRocketBullet() 
{ 
 //   m_rocket.DrawParticles(m_CurPos,m_direction); 
} 
void  CBullet::DrawExplosion() 
{ 
	glEnable(GL_TEXTURE_2D); 
	glEnable(GL_ALPHA_TEST); 
	glDisable(GL_CULL_FACE); 
 	glBindTexture(GL_TEXTURE_2D,m_pTexResource[3] );     
	glBlendFunc(GL_ONE,GL_ONE); 
	glEnable(GL_BLEND);   
	float size=3.0f; 
    glPushMatrix();	 
	glTranslatef(m_oldPos.xpos,m_oldPos.ypos,m_oldPos.zpos); 
	glRotatef(m_rotY,  0.0f,1.0f,0.0f); 
	 
	glBegin(GL_TRIANGLE_STRIP); 
	    glTexCoord2f(0,0); 
	    glVertex3f(-size,0,0); 
	    glTexCoord2f(1,0); 
	    glVertex3f(size,0,0);	     
	    glTexCoord2f(0,1); 
        glVertex3f(-size,2*size,0); 
	    glTexCoord2f(1,1); 
	    glVertex3f(size,2*size,0); 
	glEnd(); 
    glPopMatrix(); 
	glDisable(GL_BLEND); 
	glEnable(GL_CULL_FACE); 
} 
 
void  CBullet::DrawGunFire() 
{ 
	glEnable(GL_TEXTURE_2D); 
	glEnable(GL_ALPHA_TEST); 
	glDisable(GL_CULL_FACE); 
	glBlendFunc(GL_ONE,GL_ONE); 
	glEnable(GL_BLEND); 
 	glBindTexture(GL_TEXTURE_2D,m_pTexResource[3]);     
	float size=0.05f; 
    glPushMatrix();	 
	glTranslatef(m_oldPos.xpos,m_oldPos.ypos,m_oldPos.zpos); 
	glRotatef(m_rotY,  0.0f,1.0f,0.0f); 
	glRotatef(-m_rotX,  1.0f,0.0f,0.0f);	 
	glBegin(GL_TRIANGLE_STRIP); 
	    glTexCoord2f(0,0); 
	    glVertex3f(-size,-size,0); 
	    glTexCoord2f(1,0); 
	    glVertex3f(size,-size,0);	     
	    glTexCoord2f(0,1); 
        glVertex3f(-size,size,0); 
	    glTexCoord2f(1,1); 
	    glVertex3f(size,size,0); 
	glEnd(); 
    glPopMatrix(); 
	glDisable(GL_BLEND); 
	glEnable(GL_CULL_FACE); 
}