Philippe OLLIVIER

I want to draw a 3d aspect sphere in a jsui fader.

In order to have best result, i don't redraw the background each time 

I first draw the bg in a sketch called "myskechbg" and when i update 

the jsui, i just redraw it using the copypixels method.

This work great except a little problem :

I draw a plane in the bg and if the color of this plane is choosen by 

arguments in the jsui, it work, but if i send the message rgb2 to my 

jsui and then redraw the bg and then redraw the fader, the plane in 

I am quite sure i made a mistake in my 3D code, but as i am not 

really experimented with open gl, i can't find it.

I wonder if my explications are clear enough...

        //scale everything to box size

        glmatrixmode("modelview");

        sketch.shapeorient(0,0,0)

        glclear();            

        copypixels(mysketchbg,0,0);

        glcolor(vfrgb);        

        moveto(0.,1.6*val-0.8); //on screen in range -0.8 to 0.8     

I have a problem with bgcolor in a jsui.
I want to draw a 3d aspect sphere in a jsui fader.
In order to have best result, i don't redraw the background each time  
i move the fader.
I first draw the bg in a sketch called "myskechbg" and when i update  
the jsui, i just redraw it using the copypixels method.

I draw a plane in the bg and if the color of this plane is choosen by  
arguments in the jsui, it work, but if i send the message rgb2 to my  
jsui and then redraw the bg and then redraw the fader, the plane in  
the background dissappears.

Can someone help me?
I am quite sure i made a mistake in my 3D code, but as i am not  
really experimented with open gl, i can't find it.

The code is below.
Thanks.
Philippe OLLIVIER.

*/
inlets=2;
outlets=3;
autowatch=1;
sketch.ortho3d();
var val = 0;
var vbrgb = [1.,1.,1.];
var vfrgb = [0.7,0.2,0.2];
var vrgb2 = [0.5,0.5,0.5];
var vmode = 0;
var voutline = 1;
var width = box.rect[2] - box.rect[0];
var height = box.rect[3] - box.rect[1];
var aspect = width/height;
var mysketchbg=new Sketch(width,height)
mysketchbg.ortho3d();

// process arguments
if (jsarguments.length>1)
	vfrgb[0] = jsarguments[1]/255.;
if (jsarguments.length>2)
	vfrgb[1] = jsarguments[2]/255.;
if (jsarguments.length>3)
	vfrgb[2] = jsarguments[3]/255.;
if (jsarguments.length>4)
	vbrgb[0] = jsarguments[4]/255.;
if (jsarguments.length>5)
	vbrgb[1] = jsarguments[5]/255.;
if (jsarguments.length>6)
	vbrgb[2] = jsarguments[6]/255.;
if (jsarguments.length>7)
	vrgb2[0] = jsarguments[7]/255.;
if (jsarguments.length>8)
	vrgb2[1] = jsarguments[8]/255.;
if (jsarguments.length>9)
	vrgb2[2] = jsarguments[9]/255.;
if (jsarguments.length>10)
	vmode = jsarguments[10];
if (jsarguments.length>11)
	voutline = jsarguments[11];

		//scale everything to box size
		glmatrixmode("modelview");
		glpushmatrix();
		glscale(aspect,1,1);
		glenable("line_smooth");

		// erase background
		glclearcolor(vbrgb);
		glclear();	

		sketch.shapeorient(0,0,0)
		glcolor(vrgb2);
		shapeslice(1,1);
		moveto(0,0);
		plane(0.1,0.8);

		// erase background
		glclearcolor(vbrgb);
		glclear();			

		//draw line
		copypixels(mysketchbg,0,0);

		// draw marker
		glcolor(vfrgb);		
		moveto(0.,1.6*val-0.8); //on screen in range -0.8 to 0.8 	
		sketch.sphere(aspect*.5)

	}
}
function frgb(r,g,b)
{
	vfrgb[0] = r/255.;
	vfrgb[1] = g/255.;
	vfrgb[2] = b/255.;
	draw();
	refresh();
}

function rgb2(r,g,b)
{
	vrgb2[0] = r/255.;
	vrgb2[1] = g/255.;
	vrgb2[2] = b/255.;
	draw_bg();
	draw();
	refresh();
}

function brgb(r,g,b)
{
	vbrgb[0] = r/255.;
	vbrgb[1] = g/255.;
	vbrgb[2] = b/255.;
	draw_bg();
	draw();
	refresh();
}

function mode(v)
{
	vmode = v;
	draw();
	refresh();
}

function outline(v)
{
	voutline = v;
	draw();
	refresh();
}

problem-with-bgcolor-in-a-jsui

On Jun 5, 2006, at 8:15 AM, Philippe OLLIVIER wrote:

> I draw a plane in the bg and if the color of this plane is choosen 

> by arguments in the jsui, it work, but if i send the message rgb2 

> to my jsui and then redraw the bg and then redraw the fader, the 

In the following function, you need to pop the modelview 

transformation stack. i.e. after the plane() call, you need to call

Otherwise you are scaling over and over again. With this change, the 

> I draw a plane in the bg and if the color of this plane is choosen  
> by arguments in the jsui, it work, but if i send the message rgb2  
> to my jsui and then redraw the bg and then redraw the fader, the  
> plane in the background disappears.

In the following function, you need to pop the modelview  
transformation stack. i.e. after the plane() call, you need to call

glmatrixmode("modelview");
glpopmatrix();

Otherwise you are scaling over and over again. With this change, the  
rgb2 message seems to work fine for me.

Problem with bgcolor in a jsui