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📄 lodterrain.cpp

📁 里内面有两个关于地形的模拟的范例,仔细看一下会收获不小啊
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📖 第 1 页 / 共 3 页
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123 
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX+iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x+iChildNodeOffset,z,vertices[i]);
			i++;
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fBottomZ,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ-iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z-iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			GenerateVertex(x,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX-iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			RenderNode(x+iChildNodeOffset,z+iChildNodeOffset,iChildNodeLength);
		}
		if(bTopRight==false && bTopLeft==true && bBottomRight==false && bBottomLeft==false){
			i=0;
			GenerateVertex(x+iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			if((x+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fRightX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x+iChildNodeOffset,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			if((x+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iOutChildNodeOffset,iZ-iChildNodeOffset)==true){
				GenerateVertex(fRightX,z-iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,fBottomZ,vertices[i]);
			i++;
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX+iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fBottomZ,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ-iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z-iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			GenerateVertex(x-iChildNodeOffset,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			RenderNode(x-iChildNodeOffset,z+iChildNodeOffset,iChildNodeLength);
		}
		if(bTopRight==false && bTopLeft==false && bBottomRight==true && bBottomLeft==false){
			i=0;
			GenerateVertex(x+iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			if((x+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fRightX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			GenerateVertex(x+iChildNodeOffset,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fBottomZ,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ-iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z-iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX-iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			RenderNode(x+iChildNodeOffset,z-iChildNodeOffset,iChildNodeLength);
		}
		if(bTopRight==false && bTopLeft==false && bBottomRight==false && bBottomLeft==true){
			i=0;
			GenerateVertex(x+iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			if((x+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fRightX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x+iChildNodeOffset,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			if((x+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iOutChildNodeOffset,iZ-iChildNodeOffset)==true){
				GenerateVertex(fRightX,z-iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,fBottomZ,vertices[i]);
			i++;
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX+iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			GenerateVertex(x,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x-iChildNodeOffset,z,vertices[i]);
			i++;
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX-iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			RenderNode(x-iChildNodeOffset,z-iChildNodeOffset,iChildNodeLength);
		}
		if(bTopRight==false && bTopLeft==false && bBottomRight==false && bBottomLeft==false){
			i=0;
			GenerateVertex(x+iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			if((x+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fRightX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x+iChildNodeOffset,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			if((x+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX+iOutChildNodeOffset,iZ-iChildNodeOffset)==true){
				GenerateVertex(fRightX,z-iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fRightX,fBottomZ,vertices[i]);
			i++;
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX+iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x+iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(fRightX,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z-iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(x,fBottomZ,vertices[i]);
			i++;
			if((z-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iChildNodeOffset,iZ-iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fBottomZ,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fBottomZ,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ-iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z-iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
			//
			i=0;
			GenerateVertex(x-iChildNodeOffset,z+iChildNodeOffset,vertices[i]);
			i++;
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			GenerateVertex(x,z,vertices[i]);
			i++;
			GenerateVertex(fLeftX,z,vertices[i]);
			i++;
			if((x-iOutChildNodeOffset)>=0 && GetQuadMatData(iX-iOutChildNodeOffset,iZ+iChildNodeOffset)==true){
				GenerateVertex(fLeftX,z+iChildNodeOffset,vertices[i]);
				i++;
			}
			GenerateVertex(fLeftX,fTopZ,vertices[i]);
			i++;
			if((z+iOutChildNodeOffset)<=m_iTerrainSize && GetQuadMatData(iX-iChildNodeOffset,iZ+iOutChildNodeOffset)==true){
				GenerateVertex(x-iChildNodeOffset,fTopZ,vertices[i]);
				i++;
			}
			GenerateVertex(x,fTopZ,vertices[i]);
			i++;
			RenderTriFan(vertices,i);
		}
	}
}

void CLODTerrain::GenerateVertex(float x,float z,CUSTOMVERTEX& vertex){
	int iX=(int)x;
	int iZ=(int)z;
	if(!m_bUseHeightFile)
		vertex=CUSTOMVERTEX(x,GenerateHeightData(x,z)*m_fHeightScale,z,(x/m_iTerrainSize)*m_iTexMapRepeatNum,(z/m_iTerrainSize)*m_iTexMapRepeatNum);
	else
		vertex=CUSTOMVERTEX(x,m_pucHeightData[iZ*m_iTerrainSize+iX]*m_fHeightScale,z,(x/m_iTerrainSize)*m_iTexMapRepeatNum,(z/m_iTerrainSize)*m_iTexMapRepeatNum);
}

void CLODTerrain::RenderTriFan(CUSTOMVERTEX* vertex,int iVertexCount){
	CUSTOMVERTEX* vertices;
	m_pVertexBuffer->Lock(0,0,(void**)&vertices,0);
	for(int i=0;i<iVertexCount;i++){
		vertices[i]=*(vertex+i);
	}
	m_pVertexBuffer->Unlock();
	m_pd3dDevice->SetStreamSource(0,m_pVertexBuffer,0,sizeof(CUSTOMVERTEX));
	m_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLEFAN,0,iVertexCount-2); 
}
123

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