Rotate 3D object with mouse - GameCreators Forum

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Arbrakan

13

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Joined: 10th Oct 2010

Location: Geneva

Posted: 2nd May 2017 00:21

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Hello all,

There is a way to grab a 3D object and rotate it with the "mouse"? Like a 3D Viewer?

Thanks for the help.

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Mobiius

Valued Member

21

Years of Service

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Joined: 27th Feb 2003

Location: The Cold North

Posted: 2nd May 2017 09:50

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Quote: "There is a way to grab a 3D object and rotate it with the "mouse"?"

You're right, there is.

Quote: "Like a 3D Viewer?"

None in particular.

But in all seriousness, there are many ways in which you can select and rotate a 3D object using the mouse.
My personal favorite way uses the Caligari trueSpace method of 3d interactions.
Once an object is selected for interaction, (either Rotation, Translation, or scaling) Left click and drag will interact on the X/Z planes, Right click and drag will interact on the Y plane.

This video shows the moving of the camera, then a cube. You can't see the mouse clicks but it's as I described above. Left click and drag moves on the X/Z, Right drag on the Y plane.

Signature removed by mod because it's larger than 600x120... please resize and try again.

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janbo

15

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Joined: 10th Nov 2008

Location: Germany

Posted: 3rd May 2017 10:41

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I think I know what u need

Something like this:

// set window properties
SetWindowTitle("Drag 3D Object")
SetWindowSize(1024,768,0)

// set display properties
SetVirtualResolution(100,100)
SetOrientationAllowed(1,1,1,1)
SetSyncRate(60,0) // 30fps instead of 60 to save battery
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts
SetClearColor(104,104,204)
ClearPointLights()
SetScissor(0,0,0,0)

global startx#
global starty#
global angx#
global angY#
global DistX#
global DistY#
global NewX#
global NewY#

ObjectID=CreateObjectBox(5,5,5)

do
	DragObject(ObjectID)
	sync()
loop

function DragObject(ObjectID)	
	// rotate the camera
    if (GetPointerPressed())
        startx#=GetPointerX()
        starty#=GetPointerY()
        angx#=GetObjectAngleX(ObjectID)
        angy#=GetObjectAngleY(ObjectID)
    endif

if (GetPointerState()=1)
        DistX#=(GetPointerX()-startx#)
        DistY#=(GetPointerY()-starty#)
    endif
	print(DistX#)
	print(DistY#)
	NewX#=CurveAngle(angy#-DistX#,NewX#,4)
	NewY#=CurveAngle(angx#-DistY#,NewY#,4)
	SetObjectRotation(ObjectID,NewY#,NewX#,0)
endfunction

function CurveAngle(DestinationAngle#,CurrentAngle#,Steps#)
	Diff#=WrapValue(CurrentAngle#-DestinationAngle#)
	if Diff#<180
		Diff#=-Diff#
	else
		Diff#=360-Diff#
	endif
	NewValue#=WrapValue(CurrentAngle#+Diff#/Steps#)
	//~ Time#=GetFrameTime()
	//~ NewValue#=WrapValue(CurrentAngle#+(Diff#*((Steps#^Time#-(Steps#-1)^Time#)/(Steps#^Time#))))
endfunction NewValue#

function WrapValue(angle#)
	if angle#<0
		angle#=angle#+360
	endif
	if angle#>360
		angle#=angle#-360
	endif
endfunction angle#

+ Code Snippet

// set window properties
SetWindowTitle("Drag 3D Object")
SetWindowSize(1024,768,0)

// set display properties
SetVirtualResolution(100,100)
SetOrientationAllowed(1,1,1,1)
SetSyncRate(60,0) // 30fps instead of 60 to save battery
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts
SetClearColor(104,104,204)
ClearPointLights()
SetScissor(0,0,0,0)

global startx#
global starty#
global angx#
global angY#
global DistX#
global DistY#
global NewX#
global NewY#

ObjectID=CreateObjectBox(5,5,5)

do
	DragObject(ObjectID)
	sync()
loop

function DragObject(ObjectID)	
	// rotate the camera
    if (GetPointerPressed())
        startx#=GetPointerX()
        starty#=GetPointerY()
        angx#=GetObjectAngleX(ObjectID)
        angy#=GetObjectAngleY(ObjectID)
    endif

    if (GetPointerState()=1)
        DistX#=(GetPointerX()-startx#)
        DistY#=(GetPointerY()-starty#)
    endif
	print(DistX#)
	print(DistY#)
	NewX#=CurveAngle(angy#-DistX#,NewX#,4)
	NewY#=CurveAngle(angx#-DistY#,NewY#,4)
	SetObjectRotation(ObjectID,NewY#,NewX#,0)
endfunction

function CurveAngle(DestinationAngle#,CurrentAngle#,Steps#)
	Diff#=WrapValue(CurrentAngle#-DestinationAngle#)
	if Diff#<180
		Diff#=-Diff#
	else
		Diff#=360-Diff#
	endif
	NewValue#=WrapValue(CurrentAngle#+Diff#/Steps#)
	//~ Time#=GetFrameTime()
	//~ NewValue#=WrapValue(CurrentAngle#+(Diff#*((Steps#^Time#-(Steps#-1)^Time#)/(Steps#^Time#))))
endfunction NewValue#

function WrapValue(angle#)
	if angle#<0
		angle#=angle#+360
	endif
	if angle#>360
		angle#=angle#-360
	endif
endfunction angle#

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