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Topic: simple 2d mesh (Read 2248 times) |
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kantaria
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simple 2d mesh
« on: Sep 13th, 2004, 8:49pm » |
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hi
it is hard for me to imagine what TRIANGLE_STRIP
really does. does it connect the current point
with the following two?
i want to create a simple mesh which later on
should be controllable to visualize a neuronal
network. has anybody done that so far? i did not
find anything althought i saw already things like
meshes contolled by different frequencies.
thanks a lot for help. . .
k
heres the code to show what im searching for:
int APPLET_WIDTH = 800;
int APPLET_HEIGHT = 600;
int beginWireX = 10;
int endWireX = APPLET_WIDTH-10;
int resWireX = 50;
int beginWireY = 10;
int endWireY = APPLET_HEIGHT-10;
int resWireY = 50;
int j=0;
int x = beginWireX;
int y = beginWireY;
float [][]pList;
void setup(){
size(APPLET_WIDTH , APPLET_HEIGHT);
background(55);
stroke(255);
pList = new float[5][5];
noFill();
//generating an 2dim array representing four rows each containing five numbers ;
for(int i=1; i<=pList.length; i++){
for(int j=1; j<=pList[0].length; j++){
pList[i-1][j-1] = j;
}
}
//print(pList[1][4]);
}
void loop(){
//clear();
translate(width/4, height/3,0);
scale(.5);
rotateX(1);
beginShape(TRIANGLE_STRIP);
for(int i = beginWireY; i<endWireY; i+=resWireY){
for(int j = beginWireX; j<endWireX; j+=resWireX){
vertex(j, i);
vertex(j, i+resWireY);
}
}
endShape();
}
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_C
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Re: simple 2d mesh
« Reply #1 on: Sep 16th, 2004, 2:22pm » |
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ok, now heres the code which does the job.
greets
_C
int APPLET_WIDTH = 800;
int APPLET_HEIGHT= 450;
color BG_COLOR;
Mesh m;
void setup(){
BG_COLOR = color(99,98,97);
size(APPLET_WIDTH, APPLET_HEIGHT);
background(BG_COLOR);
m=new Mesh();
}
void loop(){
m.drawMesh();
}
class P3d{
float x, y, z;
P3d(float _x, float _y, float _z){
x=_x; y=_y; z=_z;
}
P3d(P3d p){
x=p.x; y=p.y; z=p.z;
}
}
class PPoints{
P3d [][]PPointPos;
int PInitX, PInitY, PInitZ;
int PWidth, PHeight;
int PResX, PResY;
PPoints(int _PInitX, int _PInitY, int _PWidth, int _PHeight, int _PResX, int _PResY){
PInitX=_PInitX; PInitY=_PInitY; //PInitZ=_PInitZ;
PWidth=_PWidth; PHeight=_PHeight;
PResX=_PResX; PResY=_PResY;
PPointPos=new P3d[PHeight/PResY][PWidth/PResX] ; //this is a matrix building lines and rows that will be filled with P3ds;
update();
}
void update(){
calcPositions();
}
void calcPositions(){
for(int j=0; j<PHeight/PResY; j++){ //fill the array with "width/res points per row";
for(int i=0; i<PWidth/PResX; i++){
PPointPos[j][i]=new P3d(i*PResX+PInitX,j*PResY+PInitY,0);
}
}
}
}
class Mesh{
PPoints meshPoints;
Mesh(){
meshPoints = new PPoints(40, 40, 400, 400, 4, 4); //creating a mesh at 40,40/size of 400,400/cellsize of 40,40;
//printMeshPoints();
}
void printMeshPoints(){
for(int i=0; i<meshPoints.PPointPos.length; i++){
for(int j=0; j<meshPoints.PPointPos[0].length; j++){
println("row: "+i+" position: "+j+" x:"+meshPoints.PPointPos[i][j].x+" y:"+meshPoints.PPointPos[i][j].y);
}
}
}
void drawMesh(){
noFill();
stroke(255);
for(int r=0; r<meshPoints.PPointPos.length-1; r++){ //from row zero upwars till the last line;
beginShape(TRIANGLE_STRIP); //AH - just write this after calling the jump-to-next-line-command, so it will start a new strip-line without connecting it with the last line.
for(int j=0; j<meshPoints.PPointPos[r].length; j++){
vertex(meshPoints.PPointPos[r][j].x, meshPoints.PPointPos[r][j].y, meshPoints.PPointPos[r][j].z);
vertex(meshPoints.PPointPos[r+1][j].x, meshPoints.PPointPos[r+1][j].y, meshPoints.PPointPos[r+1][j].z);
endShape();
}
}
}
}
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Markavian
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Re: simple 2d mesh
« Reply #2 on: Sep 28th, 2004, 12:13am » |
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Ok, so you made the mesh.. tested it seems ok.. what were ya gonna do with it?
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