combining shape3d with JMCvideo texture

Contributed Library Questions

ikillbombs

combining shape3d with JMCvideo texture

in Contributed Library Questions • 2 years ago

Hi everybody,

i want to combine the shape3D library with a JMCvideo image. I was thinking something like this:

// put in setup
void makeBezierShape() {

// Create a Bezier object based on array of PVector
bz = new Bezier2D(v, v.length);
// Create a new BezierShape (3D) based on Bezier object
// with 36 slices (along Bezier curve length), 20 segmnts
// (round 360 circumference and will use normals to enable
// shading.
bzshape = new BezShape(this, bz, 36, 20);

//texture(harpCam);

}
// put in draw
void BezierTexture(){

    PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;

GL gl = pgl.beginGL();

gl.glViewport(0, 0, widthSketch, heightSketch);
   bzshape.setTexture(myMovie);
   //myMovie.image(gl, 0, 0, myMovie.width, myMovie.height);

    bzshape.drawMode(Shape3D.TEXTURE);
     pgl.endGL();
}

The texture becomes black, but doesn't play the video.

loading of video goes like this:

PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;

GL gl = pgl.beginGL();

gl.glViewport(0, 0, widthSketch, heightSketch);

myMovie.image(gl, 0, 0, myMovie.width, myMovie.height);

pgl.endGL();

in the javadocs they say it could load a PImage:

http://www.lagers.org.uk/s3d4p/distribution/web/reference/shapes3d/Mesh2DCore.html#setTexture(processing.core.PImage)

i've found somebody that was talking about:

solved by extending JMCVideoGL to support positioning the texture in 3D space.

myMovie.initializeTexture();

is it something with refreshing the texture?

Replies(3)

quarks

Re: combining shape3d with JMCvideo texture

2 years ago

I have not tried Shapes3D with a video source to update the texture but it should be possible. I suggest that you update the image outside the draw method so there is no conflict between drawing the image and updating it.

To do that inside setup use

registerPre(this);

Now add a method with this signature

void pre() {
}

The pre method will be executed before each execution of draw()

In pre create a new PImage from the video cam and when completed use setTexture to set the texture.

This might work

ikillbombs

Re: combining shape3d with JMCvideo texture

2 years ago

Hi, i've tried this, but couldn't get it working. Do you have an example of this maybe?

M

quarks

Re: Re: combining shape3d with JMCvideo texture

2 years ago

As I said I have not tried this with the JMCVideoGL library or any video input but I have not experienced any problems with changing the textures at runtime provided you have a PImage loaded to use.

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