isohex16_3.cpp

来自「一個遊戲教程」· C++ 代码 · 共 600 行 · 第 1/2 页

	//calculate anchor space
	Scroller.AdjustWorldSpace(MouseMap.GetWidth()/2,MouseMap.GetHeight()/2,-MouseMap.GetWidth()/2,-MouseMap.GetHeight()/2);
	Scroller.CalcAnchorSpace();

	//set wrap modes for scroller
	Scroller.SetHWrapMode(WRAPMODE_CLIP);
	Scroller.SetVWrapMode(WRAPMODE_CLIP);

	//set scroller anchor to (0,0)
	Scroller.GetAnchor()->x=0;
	Scroller.GetAnchor()->y=0;

	//attach scrolelr and tilewalker to mousemap
	MouseMap.SetScroller(&Scroller);
	MouseMap.SetTileWalker(&TileWalker);

	//set up the map to a random tilefield
	for(int x=0;x<MAPWIDTH;x++)
	{
		for(int y=0;y<MAPHEIGHT;y++)
		{
			iMap[x][y]=rand()%2;
		}
	}

	return(true);//return success
}

//////////////////////////////////////////////////////////////////////////////
//CLEANUP
//////////////////////////////////////////////////////////////////////////////
void Prog_Done()
{
	//release main/back surfaces
	LPDDS_Release(&lpddsMain);

	//release clipper
	LPDDCLIP_Release(&lpddClip);

	//release directdraw
	LPDD_Release(&lpdd);
}

//////////////////////////////////////////////////////////////////////////////
//MAIN GAME LOOP
//////////////////////////////////////////////////////////////////////////////
void Prog_Loop()
{
	//clear out backbuffer
	DDBLTFX ddbltfx;
	DDBLTFX_ColorFill(&ddbltfx,0);
	lpddsBack->Blt(NULL,NULL,NULL,DDBLT_WAIT | DDBLT_COLORFILL,&ddbltfx);
	
	//move the anchor based on scrolling speed
	Scroller.MoveAnchor(ptScroll.x,ptScroll.y);

	//grab the mouse position
	POINT ptMouse;
	GetCursorPos(&ptMouse);
	//map the mouse
	ptCursor=MouseMap.MapMouse(ptMouse);

	//clip the cursor to valid map coordinates
	if(ptCursor.x<0) ptCursor.x=0;
	if(ptCursor.y<0) ptCursor.y=0;
	if(ptCursor.x>(MAPWIDTH-1)) ptCursor.x=MAPWIDTH-1;
	if(ptCursor.y>(MAPHEIGHT-1)) ptCursor.y=MAPHEIGHT-1;

	//the corner map locations of the display
	POINT ptCornerUpperLeft;
	POINT ptCornerUpperRight;
	POINT ptCornerLowerLeft;
	POINT ptCornerLowerRight;

	//working variables for calculating corners
	POINT ptScreen;
	POINT ptWorld;
	POINT ptCoarse;
	POINT ptMap;

	//calculate upper left corner
	//screen point
	ptScreen.x=Scroller.GetScreenSpace()->left;
	ptScreen.y=Scroller.GetScreenSpace()->top;
	//change into world coordinate
	ptWorld=Scroller.ScreenToWorld(ptScreen);
	//adjust by mousemap reference point	
	ptWorld.x-=MouseMap.GetReferencePoint()->x;
	ptWorld.y-=MouseMap.GetReferencePoint()->y;
	//calculate coarse coordinates
	ptCoarse.x=ptWorld.x/MouseMap.GetWidth();
	ptCoarse.y=ptWorld.y/MouseMap.GetHeight();
	//adjust for negative remainders
	if(ptWorld.x%MouseMap.GetWidth()<0) ptCoarse.x--;
	if(ptWorld.y%MouseMap.GetHeight()<0) ptCoarse.y--;
	//set map point to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do eastward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_EAST);
	ptMap.x*=ptCoarse.x;
	ptMap.y*=ptCoarse.x;
	//assign ptmap to corner point
	ptCornerUpperLeft.x=ptMap.x;
	ptCornerUpperLeft.y=ptMap.y;
	//reset ptmap to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do southward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_SOUTH);
	ptMap.x*=ptCoarse.y;
	ptMap.y*=ptCoarse.y;
	//add ptmap to corner point
	ptCornerUpperLeft.x+=ptMap.x;
	ptCornerUpperLeft.y+=ptMap.y;

	//calculate upper right corner
	//screen point
	ptScreen.x=Scroller.GetScreenSpace()->right;
	ptScreen.y=Scroller.GetScreenSpace()->top;
	//change into world coordinate
	ptWorld=Scroller.ScreenToWorld(ptScreen);
	//adjust by mousemap reference point	
	ptWorld.x-=MouseMap.GetReferencePoint()->x;
	ptWorld.y-=MouseMap.GetReferencePoint()->y;
	//calculate coarse coordinates
	ptCoarse.x=ptWorld.x/MouseMap.GetWidth();
	ptCoarse.y=ptWorld.y/MouseMap.GetHeight();
	//adjust for negative remainders
	if(ptWorld.x%MouseMap.GetWidth()<0) ptCoarse.x--;
	if(ptWorld.y%MouseMap.GetHeight()<0) ptCoarse.y--;
	//set map point to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do eastward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_EAST);
	ptMap.x*=ptCoarse.x;
	ptMap.y*=ptCoarse.x;
	//assign ptmap to corner point
	ptCornerUpperRight.x=ptMap.x;
	ptCornerUpperRight.y=ptMap.y;
	//reset ptmap to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do southward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_SOUTH);
	ptMap.x*=ptCoarse.y;
	ptMap.y*=ptCoarse.y;
	//add ptmap to corner point
	ptCornerUpperRight.x+=ptMap.x;
	ptCornerUpperRight.y+=ptMap.y;

	//calculate lower left corner
	//screen point
	ptScreen.x=Scroller.GetScreenSpace()->left;
	ptScreen.y=Scroller.GetScreenSpace()->bottom;
	//change into world coordinate
	ptWorld=Scroller.ScreenToWorld(ptScreen);
	//adjust by mousemap reference point	
	ptWorld.x-=MouseMap.GetReferencePoint()->x;
	ptWorld.y-=MouseMap.GetReferencePoint()->y;
	//calculate coarse coordinates
	ptCoarse.x=ptWorld.x/MouseMap.GetWidth();
	ptCoarse.y=ptWorld.y/MouseMap.GetHeight();
	//adjust for negative remainders
	if(ptWorld.x%MouseMap.GetWidth()<0) ptCoarse.x--;
	if(ptWorld.y%MouseMap.GetHeight()<0) ptCoarse.y--;
	//set map point to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do eastward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_EAST);
	ptMap.x*=ptCoarse.x;
	ptMap.y*=ptCoarse.x;
	//assign ptmap to corner point
	ptCornerLowerLeft.x=ptMap.x;
	ptCornerLowerLeft.y=ptMap.y;
	//reset ptmap to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do southward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_SOUTH);
	ptMap.x*=ptCoarse.y;
	ptMap.y*=ptCoarse.y;
	//add ptmap to corner point
	ptCornerLowerLeft.x+=ptMap.x;
	ptCornerLowerLeft.y+=ptMap.y;

	//calculate lower right corner
	//screen point
	ptScreen.x=Scroller.GetScreenSpace()->right;
	ptScreen.y=Scroller.GetScreenSpace()->bottom;
	//change into world coordinate
	ptWorld=Scroller.ScreenToWorld(ptScreen);
	//adjust by mousemap reference point	
	ptWorld.x-=MouseMap.GetReferencePoint()->x;
	ptWorld.y-=MouseMap.GetReferencePoint()->y;
	//calculate coarse coordinates
	ptCoarse.x=ptWorld.x/MouseMap.GetWidth();
	ptCoarse.y=ptWorld.y/MouseMap.GetHeight();
	//adjust for negative remainders
	if(ptWorld.x%MouseMap.GetWidth()<0) ptCoarse.x--;
	if(ptWorld.y%MouseMap.GetHeight()<0) ptCoarse.y--;
	//set map point to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do eastward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_EAST);
	ptMap.x*=ptCoarse.x;
	ptMap.y*=ptCoarse.x;
	//assign ptmap to corner point
	ptCornerLowerRight.x=ptMap.x;
	ptCornerLowerRight.y=ptMap.y;
	//reset ptmap to 0,0
	ptMap.x=0;
	ptMap.y=0;
	//do southward tilewalk
	ptMap=TileWalker.TileWalk(ptMap,ISO_SOUTH);
	ptMap.x*=ptCoarse.y;
	ptMap.y*=ptCoarse.y;
	//add ptmap to corner point
	ptCornerLowerRight.x+=ptMap.x;
	ptCornerLowerRight.y+=ptMap.y;

	//tilewalk from corners
	ptCornerUpperLeft=TileWalker.TileWalk(ptCornerUpperLeft,ISO_NORTHWEST);
	ptCornerUpperRight=TileWalker.TileWalk(ptCornerUpperRight,ISO_NORTHEAST);
	ptCornerLowerLeft=TileWalker.TileWalk(ptCornerLowerLeft,ISO_SOUTHWEST);
	ptCornerLowerRight=TileWalker.TileWalk(ptCornerLowerRight,ISO_SOUTHEAST);

	//main rendering loop
	//vars for rendering loop
	POINT ptCurrent;
	POINT ptRowStart;
	POINT ptRowEnd;
	DWORD dwRowCount=0;

	//set up rows
	ptRowStart=ptCornerUpperLeft;
	ptRowEnd=ptCornerUpperRight;

	//start rendering loops
	for(;;)//"infinite" loop
	{
		//set current point to rowstart
		ptCurrent=ptRowStart;

		//render a row of tiles
		for(;;)//'infinite' loop
		{

			//check for valid point. if valid, render
			if(ptCurrent.x>=0 && ptCurrent.y>=0 && ptCurrent.x<MAPWIDTH && ptCurrent.y<MAPHEIGHT)
			{
				//valid, so render
				ptScreen=TilePlotter.PlotTile(ptCurrent);//plot tile
				ptScreen=Scroller.WorldToScreen(ptScreen);//world->screen
				tsBack.PutTile(lpddsBack,ptScreen.x,ptScreen.y,0);//put background tile
				if(iMap[ptCurrent.x][ptCurrent.y])//check for tree
				{
					tsShadow.PutTile(lpddsBack,ptScreen.x,ptScreen.y,0);//put shadow
					tsTree.PutTile(lpddsBack,ptScreen.x,ptScreen.y,0);//put tree
				}
			}
			
			//check if at end of row. if we are, break out of inner loop
			if(ptCurrent.x==ptRowEnd.x && ptCurrent.y==ptRowEnd.y) break;

			//walk east to next tile
			ptCurrent=TileWalker.TileWalk(ptCurrent,ISO_EAST);
		}

		//check to see if we are at the last row. if we are, break out of loop
		if(ptRowStart.x==ptCornerLowerLeft.x && ptRowStart.y==ptCornerLowerLeft.y) break;

		//move the row start and end points, based on the row number
		if(dwRowCount&1)
		{
			//odd
			//start moves SW, end moves SE
			ptRowStart=TileWalker.TileWalk(ptRowStart,ISO_SOUTHWEST);
			ptRowEnd=TileWalker.TileWalk(ptRowEnd,ISO_SOUTHEAST);
		}
		else
		{
			//even
			//start moves SE, end moves SW
			ptRowStart=TileWalker.TileWalk(ptRowStart,ISO_SOUTHEAST);
			ptRowEnd=TileWalker.TileWalk(ptRowEnd,ISO_SOUTHWEST);
		}

		//increase the row number
		dwRowCount++;
	}

	//flip to show the back buffer
	lpddsMain->Flip(0,DDFLIP_WAIT);
}