Function drawPoly

src/engineDraw.js:634–671

Draw colored polygon using passed in points * @param {Array } points - Array of Vector2 points * @param {Color} [color=WHITE] * @param {number} [lineWidth] * @param {Color} [lineColor=BLACK] * @param {Vector2} [pos=vec2()] - Offset to apply * @param {number} [angle] - Angle

(points, color=WHITE, lineWidth=0, lineColor=BLACK, pos=vec2(), angle=0, useWebGL=glEnable, screenSpace=false, context=undefined)

 *  @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} [context]
 *  @memberof Draw */
function drawPoly(points, color=WHITE, lineWidth=0, lineColor=BLACK, pos=vec2(), angle=0, useWebGL=glEnable, screenSpace=false, context=undefined)
{
    ASSERT(isVector2(pos), 'pos must be a vec2');
    ASSERT(isArray(points), 'points must be an array');
    ASSERT(isColor(color) && isColor(lineColor), 'color is invalid');
    ASSERT(isNumber(lineWidth), 'lineWidth must be a number');
    ASSERT(isNumber(angle), 'angle must be a number');
    ASSERT(!context || !useWebGL, 'context only supported in canvas 2D mode');

    if (useWebGL && glEnable)
    {
        ASSERT(!!glContext, 'WebGL is not enabled!');
        let size = vec2(1);
        if (screenSpace)
            [pos, size, angle] = screenToWorldTransform(pos, size, angle);
        glDrawPointsTransform(points, color.rgbaInt(), pos.x, pos.y, size.x, size.y, angle);
        if (lineWidth > 0)
            glDrawOutlineTransform(points, lineColor.rgbaInt(), lineWidth, pos.x, pos.y, size.x, size.y, angle);
    }
    else
    {
        drawCanvas2D(pos, vec2(1), angle, false, context=>
        {
            context.fillStyle = color.toString();
            context.beginPath();
            for (const point of points)
                context.lineTo(point.x, point.y);
            context.closePath();
            context.fill();
            if (lineWidth)
            {
                context.strokeStyle = lineColor.toString();
                context.lineWidth = lineWidth;
                context.stroke();
            }
        }, screenSpace, context);
    }
}

/** Draw colored ellipse using passed in point
 *  @param {Vector2} pos