游戏引擎

开发平台：
Visual C++

SkyDome.cpp：源码内容
							#include "SkyDome.h"
CSkyDome::CSkyDome(LPDIRECT3DDEVICE9 device, CConfiguration *config, int detail, float tdelta, float cdelta)
{
	this->device = device;
	this->detail = detail;
	this->config = config;
	this->config->set_float(p_bCloudiness, 0);
	this->time = 0;
	this->tdelta = tdelta;
	this->cdelta = cdelta;
}
bool CSkyDome::Init()
{	
	int i = 0;
	char *errortext;
	LPD3DXBUFFER errors;
	D3DXHANDLE hTechnique;
	unsigned int *indexbuffer;	
	SURFACEVERTEX* pdVertices;	
	if( FAILED( D3DXCreateTextureFromFile( device, "textures/clouds.png", &clouds ) ) )
	{
		MessageBox(NULL, "Could not find noise texture", "Textures.exe", MB_OK);	
		return false;
	}
	if( FAILED( device->CreateVertexBuffer( detail*detail*sizeof(SURFACEVERTEX),
		D3DUSAGE_WRITEONLY, D3DFVF_SURFACEVERTEX,
		D3DPOOL_DEFAULT, &v_skydome, NULL ) ) )
	{
		return false;
	}
	if( FAILED( v_skydome->Lock( 0, 0, (void**)&pdVertices, 0 ) ) )
		return false;
	{
		for(int v=0; v<detail; v++){
			for(int u=0; u<detail; u++){
				float	al = -2 * D3DX_PI * ((float)u/(detail-1.0f)),
					th = 0.6 * D3DX_PI * ((float)v/(detail-1.0f));
				pdVertices[v*detail+u].position.x = sin(th)*sin(al);
				pdVertices[v*detail+u].position.y = cos(th);
				pdVertices[v*detail+u].position.z = sin(th)*cos(al);
				pdVertices[v*detail+u].displacement = 0.0f;
			}
		}
	}
	v_skydome->Unlock();
	if(	FAILED( device->CreateIndexBuffer(	sizeof(unsigned int) * 6 * (detail-1)*(detail-1),
		D3DUSAGE_WRITEONLY,			
		D3DFMT_INDEX32,	D3DPOOL_DEFAULT,&i_skydome,NULL)))
	{
		return false;
	}
	if( FAILED( i_skydome->Lock(0,0,(void**)&indexbuffer,0 ) ) )
		return false;
	{
		for(int v=0; v<detail-1; v++){
			for(int u=0; u<detail-1; u++){
				// face 1 |/
				indexbuffer[i++]	= v*detail + u;
				indexbuffer[i++]	= v*detail + u + 1;
				indexbuffer[i++]	= (v+1)*detail + u;
				// face 2 /|
				indexbuffer[i++]	= (v+1)*detail + u;
				indexbuffer[i++]	= v*detail + u + 1;
				indexbuffer[i++]	= (v+1)*detail + u + 1;
			}
		}
	}
	i_skydome->Unlock();
	// same for skybox.fx
	D3DXCreateEffectFromFile(device, "fx\skydome.fx", 
		NULL, NULL, 0, NULL, &e_skydome, &errors );
	
	if (errors != NULL){
		errortext = (char*) errors->GetBufferPointer();
		MessageBox(NULL, errortext, "Textures.exe", MB_OK);		
	}
	e_skydome->FindNextValidTechnique(NULL, &hTechnique);    
	e_skydome->SetTechnique(hTechnique);
	return true;
}
bool CSkyDome::Update()
{
	this->time += this->tdelta;
	if(!config->get_bool(p_bisCloudy))
	{
		if(config->get_float(p_bCloudiness) > 0)
			config->set_float(p_bCloudiness, config->get_float(p_bCloudiness) - this->cdelta);
	}
	else
	{
		if(config->get_float(p_bCloudiness) < 1)
			config->set_float(p_bCloudiness, config->get_float(p_bCloudiness) + this->cdelta);
	}
	return true;
}
bool CSkyDome::Render()
{
	device->SetStreamSource( 0, v_skydome, 0, sizeof(SURFACEVERTEX) );
	device->SetFVF( D3DFVF_SURFACEVERTEX);
	device->SetIndices(i_skydome);
	D3DXMATRIXA16 fvproj((*cam)->view);
	fvproj._41 = 0;
	fvproj._42 = 0;
	fvproj._43 = 0;
	fvproj = fvproj * (*cam)->proj;
	e_skydome->Begin(NULL,NULL);
	e_skydome->Pass(0);
	
	e_skydome->SetMatrix("mViewProj",&fvproj);
	e_skydome->SetMatrix("mInvViewProj",&((*cam)->invviewproj));	
	e_skydome->SetMatrix("mInvView",&((*cam)->invview));	
	e_skydome->SetFloat("sun_alfa", config->params[p_fSunPosAlpha].fData);
	e_skydome->SetFloat("sun_theta", config->params[p_fSunPosTheta].fData);
	e_skydome->SetFloat("sun_shininess", 4*config->params[p_fSunShininess].fData);
	e_skydome->SetFloat("sun_strength", config->params[p_fSunStrength].fData);		
	e_skydome->SetFloat("t", time);
	e_skydome->SetVector("view_position", &D3DXVECTOR4((*cam)->position.x,(*cam)->position.y,(*cam)->position.z,1));	
	e_skydome->SetTexture("Clouds",clouds);	
	e_skydome->SetFloat("cloudiness", config->get_float(p_bCloudiness));
	e_skydome->SetFloat("night_day", config->get_float(p_bNight_Day));
	if(config->get_bool(p_bFogActive))
	{
		e_skydome->SetFloat("fog", 0.7f);
	}
	else
		e_skydome->SetFloat("fog", 1.0f);
	device->DrawIndexedPrimitive(	D3DPT_TRIANGLELIST,	0,	0, detail*detail, 0, 2*(detail-1)*(detail-1) );
	e_skydome->End();
	return true;
}
void CSkyDome::ChangeStatus()
{
	config->set_bool(p_bisCloudy, !config->get_bool(p_bisCloudy));
}

						