HE_Mesh : nothing happens with drawSegment

sachaamm

HE_Mesh : nothing happens with drawSegment

in Contributed Library Questions • 6 months ago

i'm dissapointed of my misunderstanding, i start with he_mesh powerful library and i try maybe the simplest custom example

i use render.drawSegment but nothing appears on the screen

/////

import wblut.math.*;

import wblut.processing.*;

import wblut.core.*;

import wblut.hemesh.*;

import wblut.geom.*;

import processing.opengl.*;

WB_Render render;

WB_ExplicitSegment segment;

void setup() {

size(600, 600, OPENGL);

segment = new WB_ExplicitSegment(0, 0, 0, 100, 100, 0);

render=new WB_Render(this);

}

void draw() {

render.drawSegment(segment);

}

////

Best regards

Replies(6)

amnon.owed

Re: HE_Mesh : nothing happens with drawSegment

6 months ago

Don't know what version you are using, but the code works all right for me.

Note that while the title is segment, this actually draws a 3D line. See the javadocs.

Adapted Code for HE_Mesh release 1.81 (march 22 2013)

import processing.opengl.*;
import wblut.processing.*;
import wblut.geom.*;
WB_ExplicitSegment segment;
WB_Render render;
void setup() {
size(600, 600, OPENGL);
segment = new WB_ExplicitSegment(0, 0, 0, 100, 100, 0);
render=new WB_Render(this);
}
void draw() {
background(255);
render.drawSegment(segment);
}

sachaamm

Re: HE_Mesh : nothing happens with drawSegment

6 months ago

hi amnon

thx for your answer.

I try once again your example but the result is the same: may i could see a line drawn in the screen?

I run this in a 64 bit operating system but i dl a 32 bit version of processing for use compliants libraries.

I use P5 2.0b7 and HE_Mesh 1.81

I'm gonna try to use a 64 bit version of Processing but honestly i don't think it's the origin of the problem

because mesh examples in tutorial as every library associated example works perfectly.

The code compiles but i saw any line in the screen but maybe it's normal if you could just answer if

i'm supposed to see a line in the screen or no

many thanks

amnon.owed

Re: HE_Mesh : nothing happens with drawSegment

6 months ago

What you should see and what I'm seeing with both Processing 1.5.1. and 2.0b8 is a diagonal line in the top-left corner of the screen going from (0,0) to (100,100).

sachaamm

Re: HE_Mesh : nothing happens with drawSegment

6 months ago

ok i'm gonna try with 1.5.1 and 2.0b8

I use drawBoundaryEdges method with mesh subdivided

from

tut003 Mesh Subdividor

void draw() {

background(120);

lights();

translate(300, 300, 0);

rotateY(mouseX*1.0f/width*TWO_PI);

rotateX(mouseY*1.0f/height*TWO_PI);

noStroke();

render.drawFaces(box);

stroke(0);

render.drawEdges(box);

stroke(255,0,0);

render.drawBoundaryEdges(box);

}

the boudary edges are not visible

does it still works only with custom creators? (HEC_FaceList, HEC_FromTriangles ..)

amnon.owed

Re: HE_Mesh : nothing happens with drawSegment

6 months ago

You should state what you expect to see.

If you mean a boundary box, then you can use this...

noFill();
stroke(255, 0, 0);
render.draw(box.getAABB());

sachaamm

Re: HE_Mesh : nothing happens with drawSegment

5 months ago

yeah it works perfectly

i try getBoundariesAsPolygons();

void draw() {
background(120);
lights();
translate(300, 300, 0);
rotateY(mouseX*1.0f/width*TWO_PI);
rotateX(mouseY*1.0f/height*TWO_PI);
noStroke();
render.drawFaces(box);
stroke(0);
render.drawEdges(box);
noFill();
stroke(255,0,0);
box.getBoundaryAsPolygons();
}

but i get no result. How i can draw the boundaries as polygons?

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