BOOL baiscobj::DisplayScene()//摄像漫游
{ float speed=0.5f; //步长
float x=g_eye[0],y=g_eye[1],z=g_eye[2];
if (KEY_DOWN(VK_SHIFT)) speed =speed*2;//按SHIFT时的加速true
if (KEY_DOWN(VK_LEFT)) g_Angle-=speed*2;//左转,方位角-
if (KEY_DOWN(VK_RIGHT)) g_Angle+=speed*2;//右转,方位角+
rad_xz = float (3.13149* g_Angle/180.0f); //计算左右旋转角度
if (KEY_DOWN(33)) g_elev +=speed; //Page UP 键
if (KEY_DOWN(34)) g_elev -=speed; //Page Down键
if (g_elev<-360) g_elev =-360; //仰俯角
if (g_elev> 360) g_elev = 360; //仰俯角
if (KEY_DOWN(VK_UP)) //前进
{ g_eye[2]+=(float)sin(rad_xz)*speed; //视点的x分量
g_eye[0]+=(float)cos(rad_xz)*speed; //视点的Z分量
}
if (KEY_DOWN(VK_DOWN)) //后退
{ g_eye[2]-=(float)sin(rad_xz)*speed; //视点的x分量
g_eye[0]-=(float)cos(rad_xz)*speed; //视点的Z分量
}
//控制到摄像机不离开地面
if(g_eye[0]< MAP_SCALE) g_eye[0]= MAP_SCALE;
if(g_eye[0]> (MAP_W-2)*MAP_SCALE) g_eye[0]= (MAP_W-2)*MAP_SCALE;
if(g_eye[2]<-(MAP_W-2)*MAP_SCALE) g_eye[2]=-(MAP_W-2)*MAP_SCALE;
if(g_eye[2]> -MAP_SCALE) g_eye[2]= -MAP_SCALE;
if (KEY_DOWN(VK_HOME)) gao += speed;
if (KEY_DOWN(VK_END)) gao -= speed;
g_eye[1] =GetHeight((float)g_eye[0],(float)g_eye[2])+gao;//设置摄像机对地位置高
//摄像机的方向
g_look[0] = (float)(g_eye[0] +100*cos(rad_xz)); //目标点X分量
g_look[2] = (float)(g_eye[2] +100*sin(rad_xz)); //目标点Z分量
g_look[1] = g_eye[1] +g_elev; //目标点Y分量
vector3_t viewdir(g_eye[0]-g_look[0], g_eye[1]-g_look[1], g_eye[2]-g_look[2]);
viewdir.Normalize();
//viewdir = -viewdir;
vector3_t viewpos(g_eye[0], g_eye[1], g_eye[2]), targepos(g_look[0], g_look[1], g_look[2]);
if (KEY_DOWN('A')) {
count--;
}
if (KEY_DOWN('Z')) {
count++;
}
viewpos = viewpos + viewdir*count;
//建立modelview矩阵方向
gluLookAt(viewpos.x, viewpos.y, viewpos.z, //视点
targepos.x, targepos.y, targepos.z, //目标点
0.0,1.0,0 //视点方向
);
glGetDoublev(GL_MODELVIEW_MATRIX, modelview);
glGetDoublev(GL_PROJECTION_MATRIX, projection);
glGetIntegerv(GL_VIEWPORT, viewport);
////////////////////////////////////////////////////////////////
int r0=abs((int)g_Angle);
test.Format("[方位=%03d X=%3.0f y=%3.0f 高=%2.1f 俯仰角=%2.0f]",
r0%360,g_eye[0],-g_eye[2],g_eye[1],g_elev);
//r+=1.0f;if(r>360) r=0;
return TRUE;
}
void RenderLightShafts(const D3DXMATRIX& view, const D3DXMATRIX& proj, const D3DXVECTOR3& eye, const D3DXVECTOR4& lightpos)
{
D3DXMATRIX world;
D3DXVECTOR3 viewdir(view._13, view._23, view._33);
D3DXVECTOR3 lightdir;
D3DXVECTOR4 lightss;
D3DXVECTOR4 texelsize(1.0f / screenwidth, 1.0f / screenheight, 0, 1);
D3DXVec3Normalize(&lightdir, (D3DXVECTOR3*)&lightpos);
float exposure = min(max(D3DXVec3Dot(&viewdir, &lightdir), 0), 1);
lightss.x = eye.x + lightpos.x;
lightss.y = eye.y + lightpos.y;
lightss.z = eye.z + lightpos.z;
lightss.w = 1;
D3DXVec4Transform(&lightss, &lightss, &view);
D3DXVec4Transform(&lightss, &lightss, &proj);
lightss.x = (1.0f + lightss.x / lightss.w) * 0.5f;
lightss.y = (1.0f - lightss.y / lightss.w) * 0.5f;
device->SetRenderTarget(0, occludersurf);
device->Clear(0, NULL, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER, 0x68686868, 1.0f, 0);
D3DXMatrixScaling(&world, 6, 6, 6);
world._42 = -2;
device->SetTransform(D3DTS_WORLD, &world);
device->SetTransform(D3DTS_VIEW, &view);
device->SetTransform(D3DTS_PROJECTION, &proj);
palm->DrawSubset(0, DXObject::Opaque);
palm->DrawSubset(1, DXObject::Opaque);
device->SetVertexDeclaration(quaddecl);
device->SetRenderState(D3DRS_ZENABLE, FALSE);
// first blur
godray->SetTechnique("godray");
godray->SetVector("lightPos", (D3DXVECTOR4*)&lightss);
godray->SetFloat("exposure", exposure);
device->SetRenderTarget(0, blursurf);
godray->Begin(0, 0);
godray->BeginPass(0);
{
device->SetTexture(0, occluders);
device->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 2, quadvertices, 6 * sizeof(float));
}
godray->EndPass();
godray->End();
// second blur
godray->SetTechnique("blur");
godray->SetVector("texelSize", &texelsize);
godray->SetVector("lightPos", (D3DXVECTOR4*)&lightss);
device->SetRenderTarget(0, occludersurf);
godray->Begin(0, 0);
godray->BeginPass(0);
{
device->SetTexture(0, blurtex);
device->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 2, quadvertices, 6 * sizeof(float));
}
godray->EndPass();
godray->End();
device->SetRenderState(D3DRS_ZENABLE, TRUE);
}
