1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
<!-- This file is to illustrate the use of the element ray and constraint ray_from_point_and_vector.
It still has not been run on any DGS, so it may contain bugs.
r is the ray starting at A following vector v; v is the vector from P to Q
-->
<construction xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xml/intergeo.xsd">
<elements>
<point id="A">
<homogeneous_coordinates>
<double>-1.0</double>
<double>1.0</double>
<double>1.0</double>
</homogeneous_coordinates>
</point>
<point id="P">
<homogeneous_coordinates>
<double>1.0</double>
<double>0.0</double>
<double>1.0</double>
</homogeneous_coordinates>
</point>
<point id="Q">
<homogeneous_coordinates>
<double>2.0</double>
<double>1.0</double>
<double>1.0</double>
</homogeneous_coordinates>
</point>
<vector id="v">
<homogeneous_coordinates>
<double>1.0</double>
<double>1.0</double>
<double>1.0</double>
</homogeneous_coordinates>
</vector>
<ray id="r">
<homogeneous_coordinates>
<double>-1.0</double>
<double>1.0</double>
<double>1.0</double>
</homogeneous_coordinates>
<direction>
<double>1.0</double>
<double>1.0</double>
<double>1.0</double>
</direction>
</ray>
</elements>
<constraints>
<free_point>
<point out="true">A</point>
</free_point>
<free_point>
<point out="true">P</point>
</free_point>
<free_point>
<point out="true">Q</point>
</free_point>
<vector_from_point_to_point>
<vector out="true">v</vector>
<point>P</point>
<point>Q</point>
</vector_from_point_to_point>
<ray_from_point_and_vector>
<ray out="true">r</ray>
<point>A</point>
<vector>v</vector>
</ray_from_point_and_vector>
</constraints>
</construction>
|
