tv_xiaoyouxi/games/dwy/cocos2d-html5-v2.2.3/cocos2d/CCDrawingPrimitives.js

/****************************************************************************
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 Copyright (c) 2008-2010 Ricardo Quesada
 Copyright (c) 2011      Zynga Inc.

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/**
 * <p>
 *   Drawing primitives Utility Class. this class is base class, it contain some render type version: Canvas, WebGL, DOM.<br/>
 *   this class contain some primitive Drawing Method: <br/>
 *     - drawPoint<br/>
 *     - drawLine<br/>
 *     - drawPoly<br/>
 *     - drawCircle<br/>
 *     - drawQuadBezier<br/>
 *     - drawCubicBezier<br/>
 *     You can change the color, width and other property by calling these WebGL API:<br/>
 *     glColor4ub(), glLineWidth(), glPointSize().<br/>
 * </p>
 * @class
 * @extends cc.Class
 * @warning These functions draws the Line, Point, Polygon, immediately. They aren't batched. <br/>
 *   If you are going to make a game that depends on these primitives, I suggest creating a batch.
 */
cc.DrawingPrimitive = cc.Class.extend(/** @lends cc.DrawingPrimitive# */{
    _renderContext:null,

    /**
     * set render context of drawing primitive
     * @param context
     */
    setRenderContext:function (context) {
        this._renderContext = context;
    },

    /**
     * returns render context of drawing primitive
     * @return {CanvasRenderingContext2D}
     */
    getRenderContext:function () {
        return this._renderContext;
    },

    /**
     * Constructor
     * @param {CanvasRenderingContext2D} renderContext
     */
    ctor:function (renderContext) {
        this._renderContext = renderContext;
    },

    /**
     * draws a point given x and y coordinate measured in points
     * @param {cc.Point} point
     */
    drawPoint:function (point) {
        cc.log("DrawingPrimitive.drawPoint() not implement!");
    },

    /**
     * draws an array of points.
     * @param {Array} points point of array
     * @param {Number} numberOfPoints
     */
    drawPoints:function (points, numberOfPoints) {
        cc.log("DrawingPrimitive.drawPoints() not implement!");
    },

    /**
     * draws a line given the origin and destination point measured in points
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     */
    drawLine:function (origin, destination) {
        cc.log("DrawingPrimitive.drawLine() not implement!");
    },

    /**
     * draws a rectangle given the origin and destination point measured in points.
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     */
    drawRect:function (origin, destination) {
        cc.log("DrawingPrimitive.drawRect() not implement!");
    },

    /**
     * draws a solid rectangle given the origin and destination point measured in points.
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     * @param {cc.Color4F} color
     */
    drawSolidRect:function (origin, destination, color) {
        cc.log("DrawingPrimitive.drawSolidRect() not implement!");
    },

    /**
     * draws a poligon given a pointer to cc.Point coordiantes and the number of vertices measured in points.
     * @param {Array} vertices a pointer to cc.Point coordiantes
     * @param {Number} numOfVertices the number of vertices measured in points
     * @param {Boolean} closePolygon The polygon can be closed or open
     * @param {Boolean} fill The polygon can be closed or open and optionally filled with current color
     */
    drawPoly:function (vertices, numOfVertices, closePolygon, fill) {
        cc.log("DrawingPrimitive.drawPoly() not implement!");
    },

    /**
     * draws a solid polygon given a pointer to CGPoint coordiantes, the number of vertices measured in points, and a color.
     * @param {Array} poli
     * @param {Number} numberOfPoints
     * @param {cc.Color4F} color
     */
    drawSolidPoly:function (poli, numberOfPoints, color) {
        cc.log("DrawingPrimitive.drawSolidPoly() not implement!");
    },

    /**
     * draws a circle given the center, radius and number of segments.
     * @param {cc.Point} center center of circle
     * @param {Number} radius
     * @param {Number} angle angle in radians
     * @param {Number} segments
     * @param {Boolean} drawLineToCenter
     */
    drawCircle:function (center, radius, angle, segments, drawLineToCenter) {
        cc.log("DrawingPrimitive.drawCircle() not implement!");
    },

    /**
     * draws a quad bezier path
     * @param {cc.Point} origin
     * @param {cc.Point} control
     * @param {cc.Point} destination
     * @param {Number} segments
     */
    drawQuadBezier:function (origin, control, destination, segments) {
        cc.log("DrawingPrimitive.drawQuadBezier() not implement!");
    },

    /**
     * draws a cubic bezier path
     * @param {cc.Point} origin
     * @param {cc.Point} control1
     * @param {cc.Point} control2
     * @param {cc.Point} destination
     * @param {Number} segments
     */
    drawCubicBezier:function (origin, control1, control2, destination, segments) {
        cc.log("DrawingPrimitive.drawCubicBezier() not implement!");
    },

    /**
     * draw a catmull rom line
     * @param {Array} points
     * @param {Number} segments
     */
    drawCatmullRom:function (points, segments) {
        cc.log("DrawingPrimitive.drawCardinalSpline() not implement!");
    },

    /**
     * draw a cardinal spline path
     * @param {Array} config
     * @param {Number} tension
     * @param {Number} segments
     */
    drawCardinalSpline:function (config, tension, segments) {
        cc.log("DrawingPrimitive.drawCardinalSpline() not implement!");
    }
});

/**
 * Canvas of DrawingPrimitive implement version
 * @class
 * @extends cc.DrawingPrimitive
 */
cc.DrawingPrimitiveCanvas = cc.DrawingPrimitive.extend(/** @lends cc.DrawingPrimitiveCanvas# */{
    _cacheArray:[],
    /**
     * draws a point given x and y coordinate measured in points
     * @override
     * @param {cc.Point} point
     * @param {Number} size
     */
    drawPoint:function (point, size) {
        if (!size) {
            size = 1;
        }
        var locScaleX = cc.EGLView.getInstance().getScaleX(), locScaleY = cc.EGLView.getInstance().getScaleY();
        var newPoint = cc.p(point.x  * locScaleX, point.y * locScaleY);
        this._renderContext.beginPath();
        this._renderContext.arc(newPoint.x, -newPoint.y, size * locScaleX, 0, Math.PI * 2, false);
        this._renderContext.closePath();
        this._renderContext.fill();
    },

    /**
     * draws an array of points.
     * @override
     * @param {Array} points point of array
     * @param {Number} numberOfPoints
     * @param {Number} size
     */
    drawPoints:function (points, numberOfPoints, size) {
        if (points == null) {
            return;
        }
        if (!size) {
            size = 1;
        }
        var locContext = this._renderContext,locScaleX = cc.EGLView.getInstance().getScaleX(), locScaleY = cc.EGLView.getInstance().getScaleY();

        locContext.beginPath();
        for (var i = 0, len = points.length; i < len; i++)
            locContext.arc(points[i].x * locScaleX, -points[i].y * locScaleY, size * locScaleX, 0, Math.PI * 2, false);
        locContext.closePath();
        locContext.fill();
    },

    /**
     * draws a line given the origin and destination point measured in points
     * @override
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     */
    drawLine:function (origin, destination) {
        var locContext = this._renderContext, locScaleX = cc.EGLView.getInstance().getScaleX(), locScaleY = cc.EGLView.getInstance().getScaleY();
        locContext.beginPath();
        locContext.moveTo(origin.x * locScaleX, -origin.y * locScaleY);
        locContext.lineTo(destination.x * locScaleX, -destination.y * locScaleY);
        locContext.closePath();
        locContext.stroke();
    },

    /**
     * draws a rectangle given the origin and destination point measured in points.
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     */
    drawRect:function (origin, destination) {
        this.drawLine(cc.p(origin.x, origin.y), cc.p(destination.x, origin.y));
        this.drawLine(cc.p(destination.x, origin.y), cc.p(destination.x, destination.y));
        this.drawLine(cc.p(destination.x, destination.y), cc.p(origin.x, destination.y));
        this.drawLine(cc.p(origin.x, destination.y), cc.p(origin.x, origin.y));
    },

    /**
     * draws a solid rectangle given the origin and destination point measured in points.
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     * @param {cc.Color4F} color
     */
    drawSolidRect:function (origin, destination, color) {
        var vertices = [
            origin,
            cc.p(destination.x, origin.y),
            destination,
            cc.p(origin.x, destination.y)
        ];

        this.drawSolidPoly(vertices, 4, color);
    },

    /**
     * draws a polygon given a pointer to cc.Point coordinates and the number of vertices measured in points.
     * @override
     * @param {Array} vertices a pointer to cc.Point coordinates
     * @param {Number} numOfVertices the number of vertices measured in points
     * @param {Boolean} closePolygon The polygon can be closed or open
     * @param {Boolean} [fill=] The polygon can be closed or open and optionally filled with current color
     */
    drawPoly:function (vertices, numOfVertices, closePolygon, fill) {
        fill = fill || false;

        if (vertices == null)
            return;

        if (vertices.length < 3)
            throw new Error("Polygon's point must greater than 2");

        var firstPoint = vertices[0], locContext = this._renderContext;
        var locScaleX = cc.EGLView.getInstance().getScaleX(), locScaleY = cc.EGLView.getInstance().getScaleY();
        locContext.beginPath();
        locContext.moveTo(firstPoint.x * locScaleX, -firstPoint.y * locScaleY);
        for (var i = 1, len = vertices.length; i < len; i++)
            locContext.lineTo(vertices[i].x * locScaleX, -vertices[i].y * locScaleY);

        if (closePolygon)
            locContext.closePath();

        if (fill)
            locContext.fill();
        else
            locContext.stroke();
    },

    /**
     * draws a solid polygon given a pointer to CGPoint coordinates, the number of vertices measured in points, and a color.
     * @param {Array} polygons
     * @param {Number} numberOfPoints
     * @param {cc.Color4F} color
     */
    drawSolidPoly:function (polygons, numberOfPoints, color) {
        this.setDrawColor4F(color.r, color.g, color.b, color.a);
        this.drawPoly(polygons, numberOfPoints, true, true);
    },

    /**
     * draws a circle given the center, radius and number of segments.
     * @override
     * @param {cc.Point} center center of circle
     * @param {Number} radius
     * @param {Number} angle angle in radians
     * @param {Number} segments
     * @param {Boolean} [drawLineToCenter=]
     */
    drawCircle: function (center, radius, angle, segments, drawLineToCenter) {
        drawLineToCenter = drawLineToCenter || false;
        var locContext = this._renderContext;
        var locScaleX = cc.EGLView.getInstance().getScaleX(), locScaleY = cc.EGLView.getInstance().getScaleY();
        locContext.beginPath();
        var endAngle = angle - Math.PI * 2;
        locContext.arc(0 | (center.x * locScaleX), 0 | -(center.y * locScaleY), radius * locScaleX, -angle, -endAngle, false);
        if (drawLineToCenter) {
            locContext.lineTo(0 | (center.x * locScaleX), 0 | -(center.y * locScaleY));
        }
        locContext.stroke();
    },

    /**
     * draws a quad bezier path
     * @override
     * @param {cc.Point} origin
     * @param {cc.Point} control
     * @param {cc.Point} destination
     * @param {Number} segments
     */
    drawQuadBezier:function (origin, control, destination, segments) {
        //this is OpenGL Algorithm
        var vertices = this._cacheArray;
        vertices.length =0;

        var t = 0.0;
        for (var i = 0; i < segments; i++) {
            var x = Math.pow(1 - t, 2) * origin.x + 2.0 * (1 - t) * t * control.x + t * t * destination.x;
            var y = Math.pow(1 - t, 2) * origin.y + 2.0 * (1 - t) * t * control.y + t * t * destination.y;
            vertices.push(cc.p(x, y));
            t += 1.0 / segments;
        }
        vertices.push(cc.p(destination.x, destination.y));

        this.drawPoly(vertices, segments + 1, false, false);
    },

    /**
     * draws a cubic bezier path
     * @override
     * @param {cc.Point} origin
     * @param {cc.Point} control1
     * @param {cc.Point} control2
     * @param {cc.Point} destination
     * @param {Number} segments
     */
    drawCubicBezier:function (origin, control1, control2, destination, segments) {
        //this is OpenGL Algorithm
        var vertices = this._cacheArray;
        vertices.length =0;

        var t = 0;
        for (var i = 0; i < segments; i++) {
            var x = Math.pow(1 - t, 3) * origin.x + 3.0 * Math.pow(1 - t, 2) * t * control1.x + 3.0 * (1 - t) * t * t * control2.x + t * t * t * destination.x;
            var y = Math.pow(1 - t, 3) * origin.y + 3.0 * Math.pow(1 - t, 2) * t * control1.y + 3.0 * (1 - t) * t * t * control2.y + t * t * t * destination.y;
            vertices.push(cc.p(x , y ));
            t += 1.0 / segments;
        }
        vertices.push(cc.p(destination.x , destination.y));

        this.drawPoly(vertices, segments + 1, false, false);
    },

    /**
     * draw a CatmullRom curve
     * @override
     * @param {Array} points
     * @param {Number} segments
     */
    drawCatmullRom:function (points, segments) {
        this.drawCardinalSpline(points, 0.5, segments);
    },

    /**
     * draw a cardinal spline path
     * @override
     * @param {Array} config
     * @param {Number} tension
     * @param {Number} segments
     */
    drawCardinalSpline:function (config, tension, segments) {
        //lazy_init();
        cc.renderContext.strokeStyle = "rgba(255,255,255,1)";
        var points = this._cacheArray;
        points.length = 0;
        var p, lt;
        var deltaT = 1.0 / config.length;

        for (var i = 0; i < segments + 1; i++) {
            var dt = i / segments;

            // border
            if (dt == 1) {
                p = config.length - 1;
                lt = 1;
            } else {
                p = 0 | (dt / deltaT);
                lt = (dt - deltaT * p) / deltaT;
            }

            // Interpolate
            var newPos = cc.CardinalSplineAt(
                cc.getControlPointAt(config, p - 1),
                cc.getControlPointAt(config, p - 0),
                cc.getControlPointAt(config, p + 1),
                cc.getControlPointAt(config, p + 2),
                tension, lt);
            points.push(newPos);
        }
        this.drawPoly(points, segments + 1, false, false);
    },

    /**
     * draw an image
     * @override
     * @param {HTMLImageElement|HTMLCanvasElement} image
     * @param {cc.Point} sourcePoint
     * @param {cc.Size} sourceSize
     * @param {cc.Point} destPoint
     * @param {cc.Size} destSize
     */
    drawImage:function (image, sourcePoint, sourceSize, destPoint, destSize) {
        var len = arguments.length;
        switch (len) {
            case 2:
                var height = image.height;
                this._renderContext.drawImage(image, sourcePoint.x, -(sourcePoint.y + height));
                break;
            case 3:
                this._renderContext.drawImage(image, sourcePoint.x, -(sourcePoint.y + sourceSize.height), sourceSize.width, sourceSize.height);
                break;
            case 5:
                this._renderContext.drawImage(image, sourcePoint.x, sourcePoint.y, sourceSize.width, sourceSize.height, destPoint.x, -(destPoint.y + destSize.height),
                    destSize.width, destSize.height);
                break;
            default:
                throw new Error("Argument must be non-nil");
                break;
        }
    },

    /**
     * draw a star
     * @param {CanvasRenderingContext2D} ctx canvas context
     * @param {Number} radius
     * @param {cc.Color3B|cc.Color4B|cc.Color4F} color
     */
    drawStar:function (ctx, radius, color) {
        var context = ctx || this._renderContext;
        radius *= cc.EGLView.getInstance().getScaleX();
        if (color instanceof cc.Color4F)
            color = new cc.Color3B(0 | (color.r * 255), 0 | (color.g * 255), 0 | (color.b * 255));
        var colorStr = "rgba(" + color.r + "," + color.g + "," + color.b;
        context.fillStyle = colorStr + ",1)";
        var subRadius = radius / 10;

        context.beginPath();
        context.moveTo(-radius, radius);
        context.lineTo(0, subRadius);
        context.lineTo(radius, radius);
        context.lineTo(subRadius, 0);
        context.lineTo(radius, -radius);
        context.lineTo(0, -subRadius);
        context.lineTo(-radius, -radius);
        context.lineTo(-subRadius, 0);
        context.lineTo(-radius, radius);
        context.closePath();
        context.fill();

        var g1 = context.createRadialGradient(0, 0, subRadius, 0, 0, radius);
        g1.addColorStop(0, colorStr + ", 1)");
        g1.addColorStop(0.3, colorStr + ", 0.8)");
        g1.addColorStop(1.0, colorStr + ", 0.0)");
        context.fillStyle = g1;
        context.beginPath();
        var startAngle_1 = 0;
        var endAngle_1 = cc.PI2;
        context.arc(0, 0, radius - subRadius, startAngle_1, endAngle_1, false);
        context.closePath();
        context.fill();
    },

    /**
     * draw a color ball
     * @param {CanvasRenderingContext2D} ctx canvas context
     * @param {Number} radius
     * @param {cc.Color3B|cc.Color4B|cc.Color4F} color
     */
    drawColorBall:function (ctx, radius, color) {
        var context = ctx || this._renderContext;
        radius *= cc.EGLView.getInstance().getScaleX();
        if (color instanceof cc.Color4F)
            color = new cc.Color3B(0 | (color.r * 255), 0 | (color.g * 255), 0 | (color.b * 255));
        var colorStr = "rgba(" + color.r + "," + color.g + "," + color.b;
        var subRadius = radius / 10;

        var g1 = context.createRadialGradient(0, 0, subRadius, 0, 0, radius);
        g1.addColorStop(0, colorStr + ", 1)");
        g1.addColorStop(0.3, colorStr + ", 0.8)");
        g1.addColorStop(0.6, colorStr + ", 0.4)");
        g1.addColorStop(1.0, colorStr + ", 0.0)");
        context.fillStyle = g1;
        context.beginPath();
        var startAngle_1 = 0;
        var endAngle_1 = cc.PI2;
        context.arc(0, 0, radius, startAngle_1, endAngle_1, false);
        context.closePath();
        context.fill();
    },

    /**
     * fill text
     * @param {String} strText
     * @param {Number} x
     * @param {Number} y
     */
    fillText:function (strText, x, y) {
        this._renderContext.fillText(strText, x, -y);
    },

    /**
     * set the drawing color with 4 unsigned bytes
     * @param {Number} r red value (0 to 255)
     * @param {Number} g green value (0 to 255)
     * @param {Number} b blue value (0 to 255)
     * @param {Number} a Alpha value (0 to 255)
     */
    setDrawColor4B:function (r, g, b, a) {
        this._renderContext.fillStyle = "rgba(" + r + "," + g + "," + b + "," + a / 255 + ")";
        this._renderContext.strokeStyle = "rgba(" + r + "," + g + "," + b + "," + a / 255 + ")";
    },

    /**
     * set the drawing color with 4 floats
     * @param {Number} r red value (0 to 1)
     * @param {Number} g green value (0 to 1)
     * @param {Number} b blue value (0 to 1)
     * @param {Number} a Alpha value (0 to 1)
     */
    setDrawColor4F:function (r, g, b, a) {
        this._renderContext.fillStyle = "rgba(" + (0 | (r * 255)) + "," + (0 | (g * 255)) + "," + (0 | (b * 255)) + "," + a + ")";
        this._renderContext.strokeStyle = "rgba(" + (0 | (r * 255)) + "," + (0 | (g * 255)) + "," + (0 | (b * 255)) + "," + a + ")";
    },

    /**
     * set the point size in points. Default 1.
     * @param {Number} pointSize
     */
    setPointSize:function (pointSize) {
    },

    /**
     * set the line width. Default 1.
     * @param {Number} width
     */
    setLineWidth:function (width) {
        this._renderContext.lineWidth = width * cc.EGLView.getInstance().getScaleX();
    }
});

/**
 * Canvas of DrawingPrimitive implement version
 * @class
 * @extends cc.DrawingPrimitive
 */
cc.DrawingPrimitiveWebGL = cc.DrawingPrimitive.extend({
    _initialized:false,
    _shader: null,
    _colorLocation:-1,
    _color: null,
    _pointSizeLocation:-1,
    _pointSize:-1,

    ctor:function (ctx) {
        if (ctx == null)
            ctx = cc.renderContext;

        if (!ctx instanceof  WebGLRenderingContext)
            throw "Can't initialise DrawingPrimitiveWebGL. context need is WebGLRenderingContext";

        cc.DrawingPrimitive.prototype.ctor.call(this, ctx);
        this._color = new cc.Color4F(1.0, 1.0, 1.0, 1.0);
    },

    lazy_init:function () {
        if (!this._initialized) {
            //
            // Position and 1 color passed as a uniform (to similate glColor4ub )
            //
            this._shader = cc.ShaderCache.getInstance().programForKey(cc.SHADER_POSITION_UCOLOR);
            this._colorLocation = this._renderContext.getUniformLocation(this._shader.getProgram(), "u_color");
            this._pointSizeLocation = this._renderContext.getUniformLocation(this._shader.getProgram(), "u_pointSize");
            //cc.CHECK_GL_ERROR_DEBUG();

            this._initialized = true;
        }
    },

    /**
     * initlialize context
     */
    drawInit:function () {
        this._initialized = false;
    },

    /**
     * draws a point given x and y coordinate measured in points
     * @param {cc.Point} point
     */
    drawPoint:function (point) {
        this.lazy_init();

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);
        this._shader.setUniformLocationWith1f(this._pointSizeLocation, this._pointSize);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, new Float32Array([point.x, point.y]), glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);

        glContext.drawArrays(glContext.POINTS, 0, 1);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * draws an array of points.
     * @param {Array} points point of array
     * @param {Number} numberOfPoints
     */
    drawPoints:function (points, numberOfPoints) {
        if (!points || points.length == 0)
            return;

        this.lazy_init();

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);
        this._shader.setUniformLocationWith1f(this._pointSizeLocation, this._pointSize);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, this._pointsToTypeArray(points), glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);

        glContext.drawArrays(glContext.POINTS, 0, points.length);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    _pointsToTypeArray:function (points) {
        var typeArr = new Float32Array(points.length * 2);
        for (var i = 0; i < points.length; i++) {
            typeArr[i * 2] = points[i].x;
            typeArr[i * 2 + 1] = points[i].y;
        }
        return typeArr;
    },

    /**
     * draws a line given the origin and destination point measured in points
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     */
    drawLine:function (origin, destination) {
        this.lazy_init();

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, this._pointsToTypeArray([origin, destination]), glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);

        glContext.drawArrays(glContext.LINES, 0, 2);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * draws a rectangle given the origin and destination point measured in points.
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     */
    drawRect:function (origin, destination) {
        this.drawLine(cc.p(origin.x, origin.y), cc.p(destination.x, origin.y));
        this.drawLine(cc.p(destination.x, origin.y), cc.p(destination.x, destination.y));
        this.drawLine(cc.p(destination.x, destination.y), cc.p(origin.x, destination.y));
        this.drawLine(cc.p(origin.x, destination.y), cc.p(origin.x, origin.y));
    },

    /**
     * draws a solid rectangle given the origin and destination point measured in points.
     * @param {cc.Point} origin
     * @param {cc.Point} destination
     * @param {cc.Color4F} color
     */
    drawSolidRect:function (origin, destination, color) {
        var vertices = [
            origin,
            cc.p(destination.x, origin.y),
            destination,
            cc.p(origin.x, destination.y)
        ];

        this.drawSolidPoly(vertices, 4, color);
    },

    /**
     * draws a polygon given a pointer to cc.Point coordiantes and the number of vertices measured in points.
     * @param {Array} vertices a pointer to cc.Point coordiantes
     * @param {Number} numOfVertices the number of vertices measured in points
     * @param {Boolean} closePolygon The polygon can be closed or open
     */
    drawPoly:function (vertices, numOfVertices, closePolygon) {
        this.lazy_init();

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, this._pointsToTypeArray(vertices), glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);

        if (closePolygon)
            glContext.drawArrays(glContext.LINE_LOOP, 0, vertices.length);
        else
            glContext.drawArrays(glContext.LINE_STRIP, 0, vertices.length);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * draws a solid polygon given a pointer to CGPoint coordiantes, the number of vertices measured in points, and a color.
     * @param {Array} poli
     * @param {Number} numberOfPoints
     * @param {cc.Color4F} color
     */
    drawSolidPoly:function (poli, numberOfPoints, color) {
        this.lazy_init();
        if (!color)
            color = this._color;

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(color._arrayBuffer,0,4), 1);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, this._pointsToTypeArray(poli), glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);
        glContext.drawArrays(glContext.TRIANGLE_FAN, 0, poli.length);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * draws a circle given the center, radius and number of segments.
     * @param {cc.Point} center center of circle
     * @param {Number} radius
     * @param {Number} angle angle in radians
     * @param {Number} segments
     * @param {Boolean} drawLineToCenter
     */
    drawCircle:function (center, radius, angle, segments, drawLineToCenter) {
        this.lazy_init();

        var additionalSegment = 1;
        if (drawLineToCenter)
            additionalSegment++;

        var coef = 2.0 * Math.PI / segments;

        var vertices = new Float32Array((segments + 2) * 2);
        if (!vertices)
            return;

        for (var i = 0; i <= segments; i++) {
            var rads = i * coef;
            var j = radius * Math.cos(rads + angle) + center.x;
            var k = radius * Math.sin(rads + angle) + center.y;

            vertices[i * 2] = j;
            vertices[i * 2 + 1] = k;
        }
        vertices[(segments + 1) * 2] = center.x;
        vertices[(segments + 1) * 2 + 1] = center.y;

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, vertices, glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);

        glContext.drawArrays(glContext.LINE_STRIP, 0, segments + additionalSegment);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * draws a quad bezier path
     * @param {cc.Point} origin
     * @param {cc.Point} control
     * @param {cc.Point} destination
     * @param {Number} segments
     */
    drawQuadBezier:function (origin, control, destination, segments) {
        this.lazy_init();

        var vertices = new Float32Array((segments + 1) * 2);

        var t = 0.0;
        for (var i = 0; i < segments; i++) {
            vertices[i * 2] = Math.pow(1 - t, 2) * origin.x + 2.0 * (1 - t) * t * control.x + t * t * destination.x;
            vertices[i * 2 + 1] = Math.pow(1 - t, 2) * origin.y + 2.0 * (1 - t) * t * control.y + t * t * destination.y;
            t += 1.0 / segments;
        }
        vertices[segments * 2] = destination.x;
        vertices[segments * 2 + 1] = destination.y;

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, vertices, glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);

        glContext.drawArrays(glContext.LINE_STRIP, 0, segments + 1);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * draws a cubic bezier path
     * @param {cc.Point} origin
     * @param {cc.Point} control1
     * @param {cc.Point} control2
     * @param {cc.Point} destination
     * @param {Number} segments
     */
    drawCubicBezier:function (origin, control1, control2, destination, segments) {
        this.lazy_init();

        var vertices = new Float32Array((segments + 1) * 2);

        var t = 0;
        for (var i = 0; i < segments; i++) {
            vertices[i * 2] = Math.pow(1 - t, 3) * origin.x + 3.0 * Math.pow(1 - t, 2) * t * control1.x + 3.0 * (1 - t) * t * t * control2.x + t * t * t * destination.x;
            vertices[i * 2 + 1] = Math.pow(1 - t, 3) * origin.y + 3.0 * Math.pow(1 - t, 2) * t * control1.y + 3.0 * (1 - t) * t * t * control2.y + t * t * t * destination.y;
            t += 1.0 / segments;
        }
        vertices[segments * 2] = destination.x;
        vertices[segments * 2 + 1] = destination.y;

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, vertices, glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);
        glContext.drawArrays(glContext.LINE_STRIP, 0, segments + 1);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * draw a catmull rom line
     * @param {Array} points
     * @param {Number} segments
     */
    drawCatmullRom:function (points, segments) {
        this.drawCardinalSpline(points, 0.5, segments);
    },

    /**
     * draw a cardinal spline path
     * @param {Array} config
     * @param {Number} tension
     * @param {Number} segments
     */
    drawCardinalSpline:function (config, tension, segments) {
        this.lazy_init();

        var vertices = new Float32Array((segments + 1) * 2);
        var p, lt, deltaT = 1.0 / config.length;
        for (var i = 0; i < segments + 1; i++) {
            var dt = i / segments;

            // border
            if (dt == 1) {
                p = config.length - 1;
                lt = 1;
            } else {
                p = 0 | (dt / deltaT);
                lt = (dt - deltaT * p) / deltaT;
            }

            var newPos = cc.CardinalSplineAt(
                cc.getControlPointAt(config, p - 1),
                cc.getControlPointAt(config, p),
                cc.getControlPointAt(config, p + 1),
                cc.getControlPointAt(config, p + 2),
                tension, lt);
            // Interpolate

            vertices[i * 2] = newPos.x;
            vertices[i * 2 + 1] = newPos.y;
        }

        this._shader.use();
        this._shader.setUniformForModelViewAndProjectionMatrixWithMat4();
        cc.glEnableVertexAttribs(cc.VERTEX_ATTRIB_FLAG_POSITION);
        this._shader.setUniformLocationWith4fv(this._colorLocation, new Float32Array(this._color._arrayBuffer,0,4), 1);

        var glContext = this._renderContext;
        var pointBuffer = glContext.createBuffer();
        glContext.bindBuffer(glContext.ARRAY_BUFFER, pointBuffer);
        glContext.bufferData(glContext.ARRAY_BUFFER, vertices, glContext.STATIC_DRAW);
        glContext.vertexAttribPointer(cc.VERTEX_ATTRIB_POSITION, 2, glContext.FLOAT, false, 0, 0);
        glContext.drawArrays(glContext.LINE_STRIP, 0, segments + 1);
        glContext.deleteBuffer(pointBuffer);

        cc.INCREMENT_GL_DRAWS(1);
    },

    /**
     * set the drawing color with 4 unsigned bytes
     * @param {Number} r red value (0 to 255)
     * @param {Number} g green value (0 to 255)
     * @param {Number} b blue value (0 to 255)
     * @param {Number} a Alpha value (0 to 255)
     */
    setDrawColor4B:function (r, g, b, a) {
        this._color.r = r / 255.0;
        this._color.g = g / 255.0;
        this._color.b = b / 255.0;
        this._color.a = a / 255.0;
    },

    /**
     * set the drawing color with 4 floats
     * @param {Number} r red value (0 to 1)
     * @param {Number} g green value (0 to 1)
     * @param {Number} b blue value (0 to 1)
     * @param {Number} a Alpha value (0 to 1)
     */
    setDrawColor4F:function (r, g, b, a) {
        this._color.r = r;
        this._color.g = g;
        this._color.b = b;
        this._color.a = a;
    },

    /**
     * set the point size in points. Default 1.
     * @param {Number} pointSize
     */
    setPointSize:function (pointSize) {
        this._pointSize = pointSize * cc.CONTENT_SCALE_FACTOR();
    },

    /**
     * set the line width. Default 1.
     * @param {Number} width
     */
    setLineWidth:function (width) {
        if(this._renderContext.lineWidth)
            this._renderContext.lineWidth(width);
    }
});

cc.PI2 = Math.PI * 2;