145 lines
4.7 KiB
JavaScript
145 lines
4.7 KiB
JavaScript
// Saving the empty rect svg
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var emptyEllipseSVG = document.getElementById("ellipse-empty-button-svg");
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// and the full rect svg so that I can change them when the user changes rect modes
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var fullEllipseSVG = document.getElementById("ellipse-full-button-svg");
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// The start mode is empty ellipse
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var ellipseDrawMode = 'empty';
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// I'm not drawing a ellipse at the beginning
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var isDrawingEllipse = false;
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// Ellipse coordinates
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let startEllipseX;
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let startEllipseY;
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let endEllipseX;
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let endEllipseY;
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// TODO: [ELLIPSE] Make it draw ellipse instead of copy-pasted rectangle
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/** Starts drawing the ellipse, saves the start coordinates
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*
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* @param {*} mouseEvent
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*/
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function startEllipseDrawing(mouseEvent) {
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// Putting the vfx layer on top of everything
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VFXLayer.canvas.style.zIndex = parseInt(currentLayer.canvas.style.zIndex, 10) + 1;;
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// Updating flag
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isDrawingEllipse = true;
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// Saving the start coords of the ellipse
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let cursorPos = Input.getCursorPosition(mouseEvent);
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startEllipseX = Math.floor(cursorPos[0] / zoom) + 0.5;
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startEllipseY = Math.floor(cursorPos[1] / zoom) + 0.5;
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drawEllipse(startEllipseX, startEllipseY);
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}
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// TODO: [ELLIPSE] Make it draw ellipse instead of copy-pasted rectangle
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/** Updates the ellipse preview depending on the position of the mouse
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*
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* @param {*} mouseEvent The mouseEvent from which we'll get the mouse position
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*/
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function updateEllipseDrawing(mouseEvent) {
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let pos = Input.getCursorPosition(mouseEvent);
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// Drawing the ellipse at the right position
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drawEllipse(Math.round(pos[0] / zoom) + 0.5, Math.round(pos[1] / zoom) + 0.5);
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}
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// TODO: [ELLIPSE] Make it draw ellipse instead of copy-pasted rectangle
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/** Finishes drawing the ellipse, decides the end coordinates and moves the preview ellipse to the
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* current layer
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*
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* @param {*} mouseEvent event from which we'll get the mouse position
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*/
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function endEllipseDrawing(mouseEvent) {
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// Getting the end position
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let currentPos = Input.getCursorPosition(mouseEvent);
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let vfxContext = VFXLayer.context;
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endEllipseX = Math.round(currentPos[0] / zoom) + 0.5;
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endEllipseY = Math.round(currentPos[1] / zoom) + 0.5;
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// Inverting end and start (start must always be the top left corner)
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if (endEllipseX < startEllipseX) {
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let tmp = endEllipseX;
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endEllipseX = startEllipseX;
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startEllipseX = tmp;
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}
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// Same for the y
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if (endEllipseY < startEllipseY) {
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let tmp = endEllipseY;
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endEllipseY = startEllipseY;
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startEllipseY = tmp;
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}
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// Resetting this
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isDrawingEllipse = false;
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// Drawing the ellipse
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startEllipseY -= 0.5;
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endEllipseY -= 0.5;
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endEllipseX -= 0.5;
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startEllipseX -= 0.5;
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// Setting the correct linewidth
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currentLayer.context.lineWidth = tool.ellipse.brushSize;
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// Drawing the ellipse using 4 lines
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currentLayer.drawLine(startEllipseX, startEllipseY, endEllipseX, startEllipseY, tool.ellipse.brushSize);
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currentLayer.drawLine(endEllipseX, startEllipseY, endEllipseX, endEllipseY, tool.ellipse.brushSize);
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currentLayer.drawLine(endEllipseX, endEllipseY, startEllipseX, endEllipseY, tool.ellipse.brushSize);
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currentLayer.drawLine(startEllipseX, endEllipseY, startEllipseX, startEllipseY, tool.ellipse.brushSize);
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// If I have to fill it, I do so
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if (ellipseDrawMode == 'fill') {
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currentLayer.context.fillRect(startEllipseX, startEllipseY, endEllipseX - startEllipseX, endEllipseY - startEllipseY);
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}
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// Clearing the vfx canvas
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vfxContext.clearRect(0, 0, VFXLayer.canvas.width, VFXLayer.canvas.height);
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}
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// TODO: [ELLIPSE] Make it draw ellipse instead of copy-pasted rectangle
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/** Draws a ellipse with end coordinates given by x and y on the VFX layer (draws
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* the preview for the ellipse tool)
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*
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* @param {*} x The current end x of the ellipse
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* @param {*} y The current end y of the ellipse
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*/
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function drawEllipse(x, y) {
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// Getting the vfx context
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let vfxContext = VFXLayer.context;
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// Clearing the vfx canvas
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vfxContext.clearRect(0, 0, VFXLayer.canvas.width, VFXLayer.canvas.height);
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// Drawing the ellipse
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vfxContext.lineWidth = tool.ellipse.brushSize;
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// Drawing the ellipse
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vfxContext.beginPath();
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if ((tool.ellipse.brushSize % 2 ) == 0) {
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vfxContext.rect(startEllipseX - 0.5, startEllipseY - 0.5, x - startEllipseX, y - startEllipseY);
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}
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else {
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vfxContext.rect(startEllipseX, startEllipseY, x - startEllipseX, y - startEllipseY);
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}
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vfxContext.setLineDash([]);
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vfxContext.stroke();
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}
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/** Sets the correct tool icon depending on its mode
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*
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*/
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function setEllipseToolSvg() {
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console.log("set eilipse svg");
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if (ellipseDrawMode == 'empty') {
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emptyEllipseSVG.setAttribute('display', 'visible');
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fullEllipseSVG.setAttribute('display', 'none');
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}
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else {
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emptyEllipseSVG.setAttribute('display', 'none');
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fullEllipseSVG.setAttribute('display', 'visible');
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}
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}
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