Using the API to Drive the Camera

This topic has 2 replies, 2 voices, and was last updated 6 years, 7 months ago by Yuri Kovelenov.

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2018-05-23 at 5:03 pm #4307

Customer

Hi Soft8soft team,
Is it possible to use the Vege3D API to set the camera? I tried a simple test, but I did not get the results that I expected.

I would like to be able to set the camera’s position and rotation from the JavaScript code. I could successfully set the position but the rotation of the camera would not update. Here is a sample of my code:

    app.ExternalInterface.setCameraView = function(posName){
        var cameraPositions = {
            "FRONT_VIEW"     : { "x" :  0.0, "y" : -5.0 , "z" : 5.0, "rotX" : 90, "rotY" : 0.0, "rotZ"  : 0.0},
            "RIGHT_VIEW"     : { "x" :  5.0, "y" :  0.0 , "z" : 0.0, "rotX" : 90, "rotY" : 0.0, "rotZ"  : 90}
        }
        var cam = v3dApp.scene.getObjectByName("Camera");
        var camPos = cameraPositions[posName];
        cam.position.set(camPos.x, 1 * camPos.z, -1 * camPos.y);
        cam.rotation.set(camPos.rotX, camPos.rotY, camPos.rotZ);
        
    }

The v3dApp var is a reference to the application. I set that elsewhere in my code.
Is there another way of doing this? A better way?
Thank you,
Jem

Jeremy Wernick

2018-05-23 at 9:14 pm #4308

jem

Customer

Rather than try to make my technique work, I think that I will use the tween() function that the puzzle logic uses. Rather than hard-coding coordinates into the JavaScript, I use empties in the Blender scene as the sources of position data. Here is my new code:

		var cameraPositions = {
			"FRONT_VIEW"   : { "cameraPositionObjName" :  "FRONT_CAMERA_POSITION",   "cameraTargetObjName" :  "OTHER_CAMERA_TARGET"},
			"RIGHT_VIEW"   : { "cameraPositionObjName" :  "RIGHT_CAMERA_POSITION",   "cameraTargetObjName" :  "OTHER_CAMERA_TARGET" }
		}
		
		var cameraPos = v3dApp.scene.getObjectByName(cameraPositions[view].cameraPositionObjName).position;
		var targetPos = v3dApp.scene.getObjectByName(cameraPositions[view].cameraTargetObjName).position;
		
		v3dApp.controls.tween(cameraPos, targetPos, 0.0)
		
	}

Thanks again,
Jem

Jeremy Wernick

2018-05-24 at 8:09 am #4314