The x and y parameters define the x- and y-coordinates of the center of the circle. To create a circle with arc (): Set start angle to 0 and end angle to 2Math.PI.
arc (x,y,r,startangle,endangle) - creates an arc/curve. I’m not focusing on mouse events against children in the scene (a new design would have no children anyway), only the (theoretical infinite +X and -Y) coordinates in the scene where the mouse is hovering/clicked. To draw a circle on a canvas, use the following methods: beginPath () - begins a path. I have tried several different examples to get the +X and -Y position of the mouse (with respect to the origin of the scene) as 3D coordinates and not 2D DOM coordinates since some design elements would have a position X,Y (CSS top,left) greater than the current view-port of the device they were on.
I've found how to display coordinates on Map(Show Mouse Coordinates ArcGIS for Developers ).
Note that Processing can only track the mouse position. How to display mouse cursor coordintes on Scene(not Map) I didn't find any code example. This way my end users would not have to re-learn or re-design their projects that were based on the 0,0 index always being in the top-left, rather than the center. The system variable mouseX always contains the current horizontal coordinate of the mouse. Then I would just multiply the -Y by -1 to get a +Y and divide +X and +Y by 12 and floor each to get the corresponding cell index as if it were still an HTML table. My goal is to confine designs to the 4th quadrant (+X,-Y). The “table” is drawn as a series of THREE.Lines spaced 12 points apart from one another. The user would be shown the current “cell ” for reference. In picture below, the camera and orbit controls are shifted so that the origin (0,0,0 ) is in the top-left (DOM style), rather than the center. The system variable mouseX always contains the current horizontal position of the mouse, relative to (0, 0) of the canvas. Some designs have hundreds, if not a thousand individual 12x12 pixel elements all being rendered at the same time.
In the other application that used these designs, the table was not rendered which helped increase performance but still took its toll on mobile devices when the designs became very large (sometimes extending folds beyond the view-port). Get the X,Y window-space position of the mouse on left click. The table was only used for position referencing. To get the current position of the mouse, attaching an event handler to any mouse action is required. I’m re-writing an existing application where a user would click cells in an HTML table and place predefined design items in them and then save that design to be used in another application.