Bezier Patches
Syntax
bezierpatch ([x1,y1,z1],[x2,y2,z2],[x3,y3,z3],[x4,y4,z4],
[x5,y5,z5],[x6,y6,z6],[x7,y7,z7],[x8,y8,z8],
[x9,y9,z9],[x10,y10,z10],[x11,y11,z11],[x12,y12,z12]);
Example
The following example show how to create a rotation object. In a first step, the
profile of the rotation object can be generated using the BOOGA Lathe
Application, which can be run from every Java-capable browser. The image show
the profile of the example object.
The Java-applet can generate a BSDDL rotation object consisting of Bézier patches. The
profile can be saved as Postscript:
0.3 0.6 m
0.1 0.4 0.6 0.0 0.0 0.0 c |
The profile on the left can be saved in Postscript-like format, which can
later be loaded in the Java applet for further processing. |
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| The rotation object as wireframe... |
...and raytraced. |
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using 3D
define RotationPatch list {
bezierpatch ([0.3,0.6,0.0] ,[0.3,0.6,0.16] ,[0.16,0.6,0.3] ,[0.0,0.6,0.3],
[0.1,0.4,0.0], [0.1,0.4,0.05], [0.05,0.4,0.1], [0.0,0.4,0.1],
[0.6,0.0,0.0], [0.6,0.0,0.33], [0.33,0.0,0.6], [0.0,0.0,0.6],
[0.0,0.0,0.0], [0.0,0.0,0.0], [0.0,0.0,0.0], [0.0,0.0,0.0] );
};
define RotationObject list {
RotationPatch;
RotationPatch{rotateY(90);}
RotationPatch{rotateY(180);}
RotationPatch{rotateY(270);}
};
RotationObject;
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