<node3d:onthefly>.setVertex

Vizard 7 » Command Index » Vizard objects » node3d » <node3d:onthefly>.setVertex

7.7

<node3d:onthefly>.setVertex

Modify a vertex position of an On-The-Fly object

<node3d:onthefly>.setVertex(
index
[x,y,z]
mode = viz.ABS_LOCAL	# Positional argument
)

index

0-based index of the vertex. Negative index can also be used to reference from end of vertex list.

[x,y,z]

The new position of the vertex

mode = viz.ABS_LOCAL

One of the following modes:

Vertex modes
viz.ABS_LOCAL	Set the raw position of the vertex.
viz.REL_LOCAL	Add the position to the existing raw position.
viz.ABS_PARENT	Set the position of the vertex in the coordinate frame of the parent node.
viz.REL_PARENT	Add the vertex to the existing position in the coordinate frame of the parent node.
viz.ABS_GLOBAL	Set the position of the vertex in the global coordinate frame.
viz.REL_GLOBAL	Add the vertex to the existing position in the global coordinate frame.

Remarks

This command allows you to modify the position of a specific vertex in the On-The-Fly object. The index is a number that can start from 0 and go up to, but not including, the number of vertices in the object.

Note: If you are frequently changing the position of a vertex, then use the <node3d:onthefly>.dynamic command to speed up rendering.

Return Value

None

Example

#Create a red triangle
viz.startLayer(viz.LINE_LOOP)
viz.vertexColor(viz.RED)
viz.vertex(-1,0,0)
viz.vertex(1,0,0)
viz.vertex(0,1,0)
triangle = viz.endLayer()

.
.
.

#Move the tip of the triangle higher
triangle.setVertex(2,0,2,0)

#Set vertex position in global coordinates
pos = [0,3,0]
triangle.setVertex(0,pos,viz.ABS_GLOBAL)