Code archives/3D Graphics - Misc/rotate the camera with the mouse smoothly
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| This function improve the rotation of the camera done with the mouse. | |||||
;---------------------------------------------------------------------------------------------- ; Title : Function to move smoothly the camera with the mouse ; Authors : Philippe C ; Version : V0.1 ; ; This library provides functionalities to move the camera in a smooth way with the mouse. ; Whatever the speed of the mouse the rotation of the camera are always smooth. ; The effect in a game seems better. ; ;---------------------------------------------------------------------------------------------- ;---------------------------------------------------------------------------------------------- ;Version 0.1 ; intial version ;---------------------------------------------------------------------------------------------- ; type created in order to manage the camera mouvement in a smooth way Type objet3dCamera Field current_value_x# Field current_value_y# End Type objet3dCamera.objet3dCamera = New objet3dCamera Function objet3dCameraWalk(camera,clickL%,clickR%,XSpeed%,YSpeed%,Zspeed%,move=1,speed#=0.3,smooth#=6.0) ;-------------------------------------------------------------------------------------------------------------------- ; The rotation of the camera are smooth ;-------------------------------------------------------------------------------------------------------------------- If speed <= 0 Then RuntimeError "objet3dCameraWalk, error program , the speed should be greater than 0 => " + speed If smooth < 1 Then RuntimeError "objet3dCameraWalk, error program , the smooth should be greater than 1 => " + smooth If camera <= 0 Then RuntimeError "objet3dCameraWalk, error program , the camera doesn |
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| ;---------------------------------------------------------------------------------------------- ; Title : Function to move smoothly the camera with the mouse ; Authors : Philippe C ; Version : V0.1 ; ; This library provides functionalities to move the camera in a smooth way with the mouse. ; Whatever the speed of the mouse the rotation of the camera are always smooth. ; The effect in a game seems better. ; ;---------------------------------------------------------------------------------------------- ;---------------------------------------------------------------------------------------------- ;Version 0.1 ; intial version ;---------------------------------------------------------------------------------------------- ; type created in order to manage the camera mouvement in a smooth way Type objet3dCamera Field current_value_x# Field current_value_y# End Type objet3dCamera.objet3dCamera = New objet3dCamera Function objet3dCameraWalk(camera,clickL%,clickR%,XSpeed%,YSpeed%,Zspeed%,move=1,speed#=0.3,smooth#=6.0) ;-------------------------------------------------------------------------------------------------------------------- ; The rotation of the camera are smooth ;-------------------------------------------------------------------------------------------------------------------- If speed <= 0 Then RuntimeError "objet3dCameraWalk, error program , the speed should be greater than 0 => " + speed If smooth < 1 Then RuntimeError "objet3dCameraWalk, error program , the smooth should be greater than 1 => " + smooth If camera <= 0 Then RuntimeError "objet3dCameraWalk, error program , the camera doesn't exist" ycamera# = EntityY(camera) oC.objet3dCamera = First objet3dCamera If oC.objet3dCamera = Null Then RuntimeError "objet3dCameraWalk, error program , the type objet3dCamera doesn't set correctly" ; move forward and backward If clickL Then MoveEntity camera,0,0,move EndIf If clickR Then MoveEntity camera,0,0,-move EndIf ; move y camera If Zspeed <> 0 MoveEntity camera,0,Zspeed,0 ycamera = EntityY(camera) EndIf ; reatblish the height of the camera because of the moveentity which folow the camera angle PositionEntity camera,EntityX(camera),ycamera,EntityZ(camera) ; the value increase smoothly oC\current_value_x = GetCurveValue(oC\current_value_x,YSpeed*speed,smooth) oC\current_value_y = GetCurveValue(oC\current_value_y,-XSpeed*speed,smooth) TurnEntity camera,oC\current_value_x,oC\current_value_y,0 ; restablish the z angle because of the move entity RotateEntity camera,EntityPitch(camera),EntityYaw(camera),0 ; center the mouse in the middle to avoid to get the cursor outside the window MoveMouse GraphicsWidth()/2,GraphicsHeight()/2 End Function Function objet3dCameraWalkInit() ;-------------------------------------------------------------------------------------------------------------------- ; ;-------------------------------------------------------------------------------------------------------------------- oC.objet3dCamera = First objet3dCamera If oC.objet3dCamera = Null Then RuntimeError "objet3dCameraWalkInit, error program , the type objet3dCamera doesn't exist" oC\current_value_x = 0.0 oC\current_value_y = 0.0 End Function Function getCurveValue#(current#,destination#,amount#) ;-------------------------------------------------------------------------------------------------------------------- ; the value is increased smoothly ;-------------------------------------------------------------------------------------------------------------------- If amount <= 0 Then RuntimeError "getCurveValue, error program , the amount should be greater than 0 => " + amount If Abs(destination - current ) < 1 Then Return destination current=current+((destination-current)/amount) If current<0.01 And current>-0.01 Then current=0 Return current End Function Function test() ;-------------------------------------------------------------------------------------------------------------------- ; to test the program ;-------------------------------------------------------------------------------------------------------------------- Graphics3D 800,600 ; cerate a simplify landscape texture = CreateTexture(256,256) SetBuffer TextureBuffer( texture ) ClsColor 0,255,0 Cls For k = 0 To 120 Step 20 For j = 0 To 120 Step 20 cube = CreateCube() ScaleEntity cube,2,2,2 brush = CreateBrush(Rnd(255),Rnd(255),Rnd(255)) PositionEntity cube,k,2,j PaintEntity cube,brush Next Next SetBuffer(BackBuffer()) terrain = CreateTerrain(128) EntityTexture terrain,texture camera=CreateCamera() PositionEntity camera,30,2,80 Color 255,255,255 ; mangement of the mouse HidePointer newcam = False MoveMouse GraphicsWidth()/2,GraphicsHeight()/2 ; init of the camera parameters objet3dCameraWalkInit() move% = 1 ; move the camera speed# = 0.3 ; decrease the speed of the mouse smooth# = 6.0 ; smooth move of the camera While Not KeyDown( 1 ) ; management of keys ; + - If KeyDown( 78 ) Then speed = speed + 0.01 : DebugLog "speed = " + speed If KeyDown( 74 ) Then speed = speed - 0.01 : DebugLog "speed = " + speed If speed <= 0 Then speed = 0.01 : DebugLog "speed = " + speed ; pg up down If KeyDown(201) Then smooth = smooth + 0.1 : DebugLog "smooth = " + smooth If KeyDown(209) Then smooth = smooth - 0.1 : DebugLog "smooth = " + smooth If smooth <= 1 Then smooth = 1 : DebugLog "smooth = " + smooth ; space bar key = KeyHit(57) If ( key = 1 And newcam = False) Then newcam = True Else If key = 1 Then newcam = False EndIf EndIf key = 0 While KeyHit(57) Wend If newcam ; new function to manage the camera rotation objet3dCameraWalk(camera,MouseDown(1),MouseDown(2),MouseXSpeed(),MouseYSpeed(),MouseZSpeed(),move,speed,smooth) Else ; standard management of the camera RotateEntity camera, EntityPitch(camera) + MouseYSpeed(), EntityYaw(camera) - MouseXSpeed(), EntityRoll(camera) EndIf RenderWorld UpdateWorld ; display information i = -20 i = i + 20 : Text 0,i,"move the mouse." i = i + 20 : Text 0,i,"change camera , hit space bar" If newcam i = i + 20 : Text 0,i,"mouse speed , use key numeric pad : + & - =>" + speed i = i + 20 : Text 0,i,"mouse smooth , use key pgup and pgdn =>" + smooth i = i + 20 : Text 0,i,"mouse left click => move forward" i = i + 20 : Text 0,i,"mouse right click => move backward" EndIf Flip Wend End Function ; to put in comment if you want to use as a library test() |
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