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-rw-r--r--js/helper-classes/RDGE/GLAnchorPoint.js239
1 files changed, 125 insertions, 114 deletions
diff --git a/js/helper-classes/RDGE/GLAnchorPoint.js b/js/helper-classes/RDGE/GLAnchorPoint.js
index 496b6f60..716f59d4 100644
--- a/js/helper-classes/RDGE/GLAnchorPoint.js
+++ b/js/helper-classes/RDGE/GLAnchorPoint.js
@@ -26,125 +26,136 @@ function GLAnchorPoint() {
26 this._nextX = 0.0; 26 this._nextX = 0.0;
27 this._nextY = 0.0; 27 this._nextY = 0.0;
28 this._nextZ = 0.0; 28 this._nextZ = 0.0;
29 29}
30 // *********** setters ************ 30 // *********** setters ************
31 this.setPos = function (x, y, z) { this._x = x; this._y = y; this._z = z; } 31GLAnchorPoint.prototype.setPos = function (x, y, z) { this._x = x; this._y = y; this._z = z; }
32 this.setPrevPos = function (x, y, z) { this._prevX = x; this._prevY = y; this._prevZ = z; } 32GLAnchorPoint.prototype.setPrevPos = function (x, y, z) { this._prevX = x; this._prevY = y; this._prevZ = z; }
33 this.setNextPos = function (x, y, z) { this._nextX = x; this._nextY = y; this._nextZ = z; } 33GLAnchorPoint.prototype.setNextPos = function (x, y, z) { this._nextX = x; this._nextY = y; this._nextZ = z; }
34
35 this.setPrevFromNext = function () {
36 //set the previous control point by reflecting the next control point
37 var dispX = this._nextX - this._x;
38 var dispY = this._nextY - this._y;
39 var dispZ = this._nextZ - this._z;
40
41 this._prevX = this._x - dispX;
42 this._prevY = this._y - dispY;
43 this._prevZ = this._z - dispZ;
44 }
45 this.setNextFromPrev = function () {
46 //set the previous control point by reflecting the next control point
47 var dispX = this._prevX - this._x;
48 var dispY = this._prevY - this._y;
49 var dispZ = this._prevZ - this._z;
50
51 this._nextX = this._x - dispX;
52 this._nextY = this._y - dispY;
53 this._nextZ = this._z - dispZ;
54 }
55 34
56 //translate the next point from the translation that was applied to the prev. point 35GLAnchorPoint.prototype.setPrevFromNext = function () {
57 this.translateNextFromPrev = function (tx, ty, tz) { 36 //set the previous control point by reflecting the next control point
58 // *** compute the rotation of the prev vector *** 37 var dispX = this._nextX - this._x;
59 var oldP = Vector.create([this._prevX + tx - this._x, this._prevY + ty - this._y, this._prevZ + tz - this._z]); 38 var dispY = this._nextY - this._y;
60 var newP = Vector.create([this._prevX - this._x, this._prevY - this._y, this._prevZ - this._z]); 39 var dispZ = this._nextZ - this._z;
61 //compute angle between the two vectors
62 var axis = Vector.create([0, 0, 0]);
63 var angle = MathUtils.getAxisAngleBetween3DVectors(oldP, newP, axis);
64 if (angle === 0)
65 return;
66
67 // *** compute the vector from anchor to next
68 var oldN = Vector.create([this._nextX - this._x, this._nextY - this._y, this._nextZ - this._z]);
69 var rotMat = Matrix.Rotation(-angle, axis);
70 var newN = MathUtils.transformVector(oldN, rotMat);
71
72 //TEMP for some situations the axis angle computation returns NaNs
73 if (isNaN(newN[0]) || isNaN(newN[1]) || isNaN(newN[2])) {
74 return;
75 }
76 //end TEMP
77 this._nextX = this._x + newN[0];
78 this._nextY = this._y + newN[1];
79 this._nextZ = this._z + newN[2];
80 }
81 //translate the next point from the translation that was applied to the prev. point
82 this.translatePrevFromNext = function (tx, ty, tz) {
83 // *** compute the rotation of the next vector ***
84 var oldN = Vector.create([this._nextX + tx - this._x, this._nextY + ty - this._y, this._nextZ + tz - this._z]);
85 var newN = Vector.create([this._nextX - this._x, this._nextY - this._y, this._nextZ - this._z]);
86 //compute angle between the two vectors
87 var axis = Vector.create([0, 0, 0]);
88 var angle = MathUtils.getAxisAngleBetween3DVectors(oldN, newN, axis);
89 if (angle === 0)
90 return;
91
92 // *** compute the vector from anchor to prev
93 var oldP = Vector.create([this._prevX - this._x, this._prevY - this._y, this._prevZ - this._z]);
94 var rotMat = Matrix.Rotation(-angle, axis);
95 var newP = MathUtils.transformVector(oldP, rotMat);
96
97 //TEMP for some situations the axis angle computation returns NaNs
98 if (isNaN(newP[0]) || isNaN(newP[1]) || isNaN(newP[2])) {
99 return;
100 }
101 //end TEMP
102 this._prevX = this._x + newP[0];
103 this._prevY = this._y + newP[1];
104 this._prevZ = this._z + newP[2];
105 }
106 40
41 this._prevX = this._x - dispX;
42 this._prevY = this._y - dispY;
43 this._prevZ = this._z - dispZ;
44}
45GLAnchorPoint.prototype.setNextFromPrev = function () {
46 //set the previous control point by reflecting the next control point
47 var dispX = this._prevX - this._x;
48 var dispY = this._prevY - this._y;
49 var dispZ = this._prevZ - this._z;
107 50
108 // ******* modifiers ******* 51 this._nextX = this._x - dispX;
109 this.translatePrev = function (x, y, z) { 52 this._nextY = this._y - dispY;
110 this._prevX += x; this._prevY += y; this._prevZ += z; 53 this._nextZ = this._z - dispZ;
111 } 54}
112 this.translateNext = function (x, y, z) { 55
113 this._nextX += x; this._nextY += y; this._nextZ += z; 56//translate the next point from the translation that was applied to the prev. point
114 } 57GLAnchorPoint.prototype.translateNextFromPrev = function (tx, ty, tz) {
115 this.translate = function (x, y, z) { 58 //do nothing if the total translation is zero
116 this._x += x; this._y += y; this._z += z; 59 var totalTransSq = (tx*tx) + (ty*ty) + (tz*tz);
117 } 60 if (totalTransSq < 0.0000001)
118 this.translateAll = function (x, y, z) { 61 return;
119 this.translate(x, y, z);
120 this.translatePrev(x, y, z);
121 this.translateNext(x, y, z);
122 }
123
124 62
125 // ********* getters ********** 63 // *** compute the rotation of the prev vector ***
126 this.getPosX = function () { return this._x; } 64 var oldP = Vector.create([this._prevX + tx - this._x, this._prevY + ty - this._y, this._prevZ + tz - this._z]);
127 this.getPosY = function () { return this._y; } 65 var newP = Vector.create([this._prevX - this._x, this._prevY - this._y, this._prevZ - this._z]);
128 this.getPosZ = function () { return this._z; } 66 //compute angle between the two vectors
129 this.getPrevX = function () { return this._prevX; } 67 var axis = Vector.create([0, 0, 0]);
130 this.getPrevY = function () { return this._prevY; } 68 var angle = MathUtils.getAxisAngleBetween3DVectors(oldP, newP, axis);
131 this.getPrevZ = function () { return this._prevZ; } 69 if (angle === 0)
132 this.getNextX = function () { return this._nextX; } 70 return;
133 this.getNextY = function () { return this._nextY; } 71
134 this.getNextZ = function () { return this._nextZ; } 72 // *** compute the vector from anchor to next
135 this.getPos = function() { return Vector.create([this._x, this._y, this._z]);} 73 var oldN = Vector.create([this._nextX - this._x, this._nextY - this._y, this._nextZ - this._z]);
136 this.getPrev = function() { return Vector.create([this._prevX, this._prevY, this._prevZ]);} 74 var rotMat = Matrix.Rotation(-angle, axis);
137 this.getNext = function() { return Vector.create([this._nextX, this._nextY, this._nextZ]);} 75 var newN = MathUtils.transformVector(oldN, rotMat);
138 //return the square of distance from passed in point to the anchor position 76
139 this.getDistanceSq = function (x, y, z) { 77 //TEMP for some situations the axis angle computation returns NaNs
140 return (this._x - x) * (this._x - x) + (this._y - y) * (this._y - y) + (this._z - z) * (this._z - z); 78 if (isNaN(newN[0]) || isNaN(newN[1]) || isNaN(newN[2])) {
141 } 79 console.log("NaN in translateNextFromPrev");
142 //return sq. of distance to prev. 80 return;
143 this.getPrevDistanceSq = function (x, y, z) {
144 return (this._prevX - x) * (this._prevX - x) + (this._prevY - y) * (this._prevY - y) + (this._prevZ - z) * (this._prevZ - z);
145 } 81 }
146 //return sq. of distance to next 82 //end TEMP
147 this.getNextDistanceSq = function (x, y, z) { 83 this._nextX = this._x + newN[0];
148 return (this._nextX - x) * (this._nextX - x) + (this._nextY - y) * (this._nextY - y) + (this._nextZ - z) * (this._nextZ - z); 84 this._nextY = this._y + newN[1];
85 this._nextZ = this._z + newN[2];
86}
87//translate the next point from the translation that was applied to the prev. point
88GLAnchorPoint.prototype.translatePrevFromNext = function (tx, ty, tz) {
89 //do nothing if the total translation is zero
90 var totalTransSq = (tx*tx) + (ty*ty) + (tz*tz);
91 if (totalTransSq < 0.0000001)
92 return;
93
94 // *** compute the rotation of the next vector ***
95 var oldN = Vector.create([this._nextX + tx - this._x, this._nextY + ty - this._y, this._nextZ + tz - this._z]);
96 var newN = Vector.create([this._nextX - this._x, this._nextY - this._y, this._nextZ - this._z]);
97 //compute angle between the two vectors
98 var axis = Vector.create([0, 0, 0]);
99 var angle = MathUtils.getAxisAngleBetween3DVectors(oldN, newN, axis);
100 if (angle === 0)
101 return;
102
103 // *** compute the vector from anchor to prev
104 var oldP = Vector.create([this._prevX - this._x, this._prevY - this._y, this._prevZ - this._z]);
105 var rotMat = Matrix.Rotation(-angle, axis);
106 var newP = MathUtils.transformVector(oldP, rotMat);
107
108 //TEMP for some situations the axis angle computation returns NaNs
109 if (isNaN(newP[0]) || isNaN(newP[1]) || isNaN(newP[2])) {
110 return;
149 } 111 }
112 //end TEMP
113 this._prevX = this._x + newP[0];
114 this._prevY = this._y + newP[1];
115 this._prevZ = this._z + newP[2];
116}
117
118
119// ******* modifiers *******
120GLAnchorPoint.prototype.translatePrev = function (x, y, z) {
121 this._prevX += x; this._prevY += y; this._prevZ += z;
122}
123GLAnchorPoint.prototype.translateNext = function (x, y, z) {
124 this._nextX += x; this._nextY += y; this._nextZ += z;
150} 125}
126GLAnchorPoint.prototype.translate = function (x, y, z) {
127 this._x += x; this._y += y; this._z += z;
128}
129GLAnchorPoint.prototype.translateAll = function (x, y, z) {
130 this.translate(x, y, z);
131 this.translatePrev(x, y, z);
132 this.translateNext(x, y, z);
133}
134
135
136// ********* getters **********
137GLAnchorPoint.prototype.getPosX = function () { return this._x; }
138GLAnchorPoint.prototype.getPosY = function () { return this._y; }
139GLAnchorPoint.prototype.getPosZ = function () { return this._z; }
140GLAnchorPoint.prototype.getPrevX = function () { return this._prevX; }
141GLAnchorPoint.prototype.getPrevY = function () { return this._prevY; }
142GLAnchorPoint.prototype.getPrevZ = function () { return this._prevZ; }