Shinobi CE officially lands on Gitlab

tools/ffmpegToWeb/Player/broadway/utils/glUtils.js

@@ -0,0 +1,117 @@
+"use strict";
+
+var Matrix = require('sylvester.js').Matrix;
+var Vector = require('sylvester.js').Vector;
+var $M     = Matrix.create;
+
+
+// augment Sylvester some
+Matrix.Translation = function (v)
+{
+  if (v.elements.length == 2) {
+    var r = Matrix.I(3);
+    r.elements[2][0] = v.elements[0];
+    r.elements[2][1] = v.elements[1];
+    return r;
+  }
+
+  if (v.elements.length == 3) {
+    var r = Matrix.I(4);
+    r.elements[0][3] = v.elements[0];
+    r.elements[1][3] = v.elements[1];
+    r.elements[2][3] = v.elements[2];
+    return r;
+  }
+
+  throw "Invalid length for Translation";
+}
+
+Matrix.prototype.flatten = function ()
+{
+    var result = [];
+    if (this.elements.length == 0)
+        return [];
+
+
+    for (var j = 0; j < this.elements[0].length; j++)
+        for (var i = 0; i < this.elements.length; i++)
+            result.push(this.elements[i][j]);
+    return result;
+}
+
+Matrix.prototype.ensure4x4 = function()
+{
+    if (this.elements.length == 4 &&
+        this.elements[0].length == 4)
+        return this;
+
+    if (this.elements.length > 4 ||
+        this.elements[0].length > 4)
+        return null;
+
+    for (var i = 0; i < this.elements.length; i++) {
+        for (var j = this.elements[i].length; j < 4; j++) {
+            if (i == j)
+                this.elements[i].push(1);
+            else
+                this.elements[i].push(0);
+        }
+    }
+
+    for (var i = this.elements.length; i < 4; i++) {
+        if (i == 0)
+            this.elements.push([1, 0, 0, 0]);
+        else if (i == 1)
+            this.elements.push([0, 1, 0, 0]);
+        else if (i == 2)
+            this.elements.push([0, 0, 1, 0]);
+        else if (i == 3)
+            this.elements.push([0, 0, 0, 1]);
+    }
+
+    return this;
+};
+
+
+Vector.prototype.flatten = function ()
+{
+    return this.elements;
+};
+
+
+
+//
+// gluPerspective
+//
+function makePerspective(fovy, aspect, znear, zfar)
+{
+    var ymax = znear * Math.tan(fovy * Math.PI / 360.0);
+    var ymin = -ymax;
+    var xmin = ymin * aspect;
+    var xmax = ymax * aspect;
+
+    return makeFrustum(xmin, xmax, ymin, ymax, znear, zfar);
+}
+
+//
+// glFrustum
+//
+function makeFrustum(left, right,
+                     bottom, top,
+                     znear, zfar)
+{
+    var X = 2*znear/(right-left);
+    var Y = 2*znear/(top-bottom);
+    var A = (right+left)/(right-left);
+    var B = (top+bottom)/(top-bottom);
+    var C = -(zfar+znear)/(zfar-znear);
+    var D = -2*zfar*znear/(zfar-znear);
+
+    return $M([[X, 0, A, 0],
+               [0, Y, B, 0],
+               [0, 0, C, D],
+               [0, 0, -1, 0]]);
+}
+
+module.exports.makePerspective = makePerspective;
+