cylinder transparency

[argo2185]

Hello,

i'm creating a closed clinder with this code:

Code: Select all

SceneGraphComponent stu = Primitives.closedCylinder(10, 5, 10, 10 , Math.PI*2);
SceneGraphComponent sgc = SceneGraphUtility.createFullSceneGraphComponent();
Appearance appearance = sgc.getAppearance();
DefaultGeometryShader dgs = ShaderUtility.createDefaultGeometryShader(appearance, false);
dgs.setShowPoints(false);
dgs.setShowLines(false);
dgs.setShowFaces(true);
DefaultPolygonShader dps = (DefaultPolygonShader) dgs.createPolygonShader("default");
dps.setDiffuseColor(Color.RED);
dps.setTransparency(0.5);

The problem is that the cylinder is not transparent. What i'm doing wrong?
Is it possible to set certain coordinates for the central point of the cylinder and then to translate the cylinder by changing the center position?

[steffen]

You have to enable transparency in the RenderingHintsShader:

Code: Select all

RenderingHintsShader rhs = ShaderUtility.createDefaultRenderingHintsShader(appearance, false);
rhs.setTransparencyEnabled(true);

This is because OpenGL does not enable transparent rendering by default. And there is also no depth buffer sorting, so you probably also want to turn on back face culling:

Code: Select all

rhs.setBackFaceCulling(true);

Steffen.

[argo2185]

i see. but the u3d exporter does not support transparency for cylinder?

is there an alternative way to create something like a cylinder but with transparency in PDF?

[argo2185]

sry, my fault. with the RenderingHintsShader is everything working, also in pdf.