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src_entity - source entity handle dest_entity - destination entity handle |
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Returns the yaw angle, that src_entity should be rotated by in order to face dest_entity. This command can be used to be point one entity at another, rotating on the y axis only. See also: dxDeltaPitch. |
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dxSetBuffer dxBackBuffer() camera=dxCreateCamera() ; Make camera orthagraphic for flat, 2D view dxCameraProjMode camera,2 ; Position and rotate camera so we have overhead (top-down) view dxPositionEntity camera,0,5,0 dxRotateEntity camera,90,0,0 ; Create red cone (the arrow) arrow=dxCreateCone() dxRotateMesh arrow,90,180,0 dxScaleMesh arrow,.1,.1,.2 dxEntityColor arrow,255,0,0 ; Create blue sphere (the spot) spot=dxCreateSphere() dxScaleMesh spot,.1,.1,.1 dxEntityColor spot,0,0,255 While Not dxKeyDown(1) ; If w,a,s,d pressed then move spot If dxKeyDown(17)=True Then dxMoveEntity spot,0,0,0.01 ; w - up If dxKeyDown(30)=True Then dxMoveEntity spot,-0.01,0,0 ; a - left If dxKeyDown(31)=True Then dxMoveEntity spot,0,0,-0.01 ; s - down If dxKeyDown(32)=True Then dxMoveEntity spot,0.01,0,0 ; d - right ; Rotate arrow using delta yaw value. Arrow will point at spot. dxRotateEntity arrow,0,dxDeltaYaw#(spot,arrow),0 dxRenderWorld dxText 0,0,"Note: Camera view is overhead. The arrow will y-rotate using dxDeltaYaw value." dxText 0,20,"Use w,a,s,d to move spot." dxText 0,40,"Delta yaw: "+dxDeltaYaw#(spot,arrow) dxFlip Wend End |