X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/0494b8d9b9bb03ab6c22b34dae81261e3cd7e3e6..7a654f8d43fdb43d78b63d90528bed6e86b608cc:/src/draw/Matrix.js

diff --git a/src/draw/Matrix.js b/src/draw/Matrix.js
new file mode 100644
index 00000000..17ef5dc7
--- /dev/null
+++ b/src/draw/Matrix.js
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+/*
+ * @class Ext.draw.Matrix
+ * @private
+ */
+Ext.define('Ext.draw.Matrix', {
+
+    /* Begin Definitions */
+
+    requires: ['Ext.draw.Draw'],
+
+    /* End Definitions */
+
+    constructor: function(a, b, c, d, e, f) {
+        if (a != null) {
+            this.matrix = [[a, c, e], [b, d, f], [0, 0, 1]];
+        }
+        else {
+            this.matrix = [[1, 0, 0], [0, 1, 0], [0, 0, 1]];
+        }
+    },
+
+    add: function(a, b, c, d, e, f) {
+        var me = this,
+            out = [[], [], []],
+            matrix = [[a, c, e], [b, d, f], [0, 0, 1]],
+            x,
+            y,
+            z,
+            res;
+
+        for (x = 0; x < 3; x++) {
+            for (y = 0; y < 3; y++) {
+                res = 0;
+                for (z = 0; z < 3; z++) {
+                    res += me.matrix[x][z] * matrix[z][y];
+                }
+                out[x][y] = res;
+            }
+        }
+        me.matrix = out;
+    },
+
+    prepend: function(a, b, c, d, e, f) {
+        var me = this,
+            out = [[], [], []],
+            matrix = [[a, c, e], [b, d, f], [0, 0, 1]],
+            x,
+            y,
+            z,
+            res;
+
+        for (x = 0; x < 3; x++) {
+            for (y = 0; y < 3; y++) {
+                res = 0;
+                for (z = 0; z < 3; z++) {
+                    res += matrix[x][z] * me.matrix[z][y];
+                }
+                out[x][y] = res;
+            }
+        }
+        me.matrix = out;
+    },
+
+    invert: function() {
+        var matrix = this.matrix,
+            a = matrix[0][0],
+            b = matrix[1][0],
+            c = matrix[0][1],
+            d = matrix[1][1],
+            e = matrix[0][2],
+            f = matrix[1][2],
+            x = a * d - b * c;
+        return new Ext.draw.Matrix(d / x, -b / x, -c / x, a / x, (c * f - d * e) / x, (b * e - a * f) / x);
+    },
+
+    clone: function() {
+        var matrix = this.matrix,
+            a = matrix[0][0],
+            b = matrix[1][0],
+            c = matrix[0][1],
+            d = matrix[1][1],
+            e = matrix[0][2],
+            f = matrix[1][2];
+        return new Ext.draw.Matrix(a, b, c, d, e, f);
+    },
+
+    translate: function(x, y) {
+        this.prepend(1, 0, 0, 1, x, y);
+    },
+
+    scale: function(x, y, cx, cy) {
+        var me = this;
+        if (y == null) {
+            y = x;
+        }
+        me.add(1, 0, 0, 1, cx, cy);
+        me.add(x, 0, 0, y, 0, 0);
+        me.add(1, 0, 0, 1, -cx, -cy);
+    },
+
+    rotate: function(a, x, y) {
+        a = Ext.draw.Draw.rad(a);
+        var me = this,
+            cos = +Math.cos(a).toFixed(9),
+            sin = +Math.sin(a).toFixed(9);
+        me.add(cos, sin, -sin, cos, x, y);
+        me.add(1, 0, 0, 1, -x, -y);
+    },
+
+    x: function(x, y) {
+        var matrix = this.matrix;
+        return x * matrix[0][0] + y * matrix[0][1] + matrix[0][2];
+    },
+
+    y: function(x, y) {
+        var matrix = this.matrix;
+        return x * matrix[1][0] + y * matrix[1][1] + matrix[1][2];
+    },
+
+    get: function(i, j) {
+        return + this.matrix[i][j].toFixed(4);
+    },
+
+    toString: function() {
+        var me = this;
+        return [me.get(0, 0), me.get(0, 1), me.get(1, 0), me.get(1, 1), 0, 0].join();
+    },
+
+    toSvg: function() {
+        var me = this;
+        return "matrix(" + [me.get(0, 0), me.get(1, 0), me.get(0, 1), me.get(1, 1), me.get(0, 2), me.get(1, 2)].join() + ")";
+    },
+
+    toFilter: function() {
+        var me = this;
+        return "progid:DXImageTransform.Microsoft.Matrix(M11=" + me.get(0, 0) +
+            ", M12=" + me.get(0, 1) + ", M21=" + me.get(1, 0) + ", M22=" + me.get(1, 1) +
+            ", Dx=" + me.get(0, 2) + ", Dy=" + me.get(1, 2) + ")";
+    },
+
+    offset: function() {
+        var matrix = this.matrix;
+        return [matrix[0][2].toFixed(4), matrix[1][2].toFixed(4)];
+    },
+
+    // Split matrix into Translate Scale, Shear, and Rotate
+    split: function () {
+        function norm(a) {
+            return a[0] * a[0] + a[1] * a[1];
+        }
+        function normalize(a) {
+            var mag = Math.sqrt(norm(a));
+            a[0] /= mag;
+            a[1] /= mag;
+        }
+        var matrix = this.matrix,
+            out = {
+                translateX: matrix[0][2],
+                translateY: matrix[1][2]
+            },
+            row;
+
+        // scale and shear
+        row = [[matrix[0][0], matrix[0][1]], [matrix[1][1], matrix[1][1]]];
+        out.scaleX = Math.sqrt(norm(row[0]));
+        normalize(row[0]);
+
+        out.shear = row[0][0] * row[1][0] + row[0][1] * row[1][1];
+        row[1] = [row[1][0] - row[0][0] * out.shear, row[1][1] - row[0][1] * out.shear];
+
+        out.scaleY = Math.sqrt(norm(row[1]));
+        normalize(row[1]);
+        out.shear /= out.scaleY;
+
+        // rotation
+        out.rotate = Math.asin(-row[0][1]);
+
+        out.isSimple = !+out.shear.toFixed(9) && (out.scaleX.toFixed(9) == out.scaleY.toFixed(9) || !out.rotate);
+
+        return out;
+    }
+});
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