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import gifplot;
public class ortho {
static {
System.loadLibrary("jgifplot");
};
public static double func(double x, double y) {
double r;
double f;
r = Math.sqrt(x*x + y*y);
f = (Math.sin(0.30*r*x)+Math.cos(0.30*r*y))/(1.0+r);
return f;
}
public static void main(String argv[]) {
FrameBuffer f;
Plot3D p3;
ColorMap cm;
double x,y;
double dx,dy;
double z1,z2,z3,z4;
int c1,c2,c3,c4;
/* Create a framebuffer */
f = new FrameBuffer(700,400);
/* Load a colormap */
cm = new ColorMap("cm15");
/* Create a new 2D image */
f.clear(gifplot.BLACK);
p3 = new Plot3D(f,-6.3,-6.3,-1.5,6.3,6.3,1.5);
/* Set viewing region in 2D plot */
p3.setview(50,50,650,350);
/* Set how far away from the image we are */
p3.lookat(20);
/* Set the field of view for the perspective */
// Plot3D_autoperspective(p3,40);
p3.autoortho();
/* Now make a plot of a 3D function */
/* Make a frame */
f.noclip();
f.box(49,49,650,350,gifplot.WHITE);
p3.start(); /* Always call this prior to making an image */
p3.clear(gifplot.BLACK);
p3.rotu(60);
p3.rotz(40);
x = -6.3;
dx = 0.25;
while (x < 6.3) {
y = -6.3;
dy = 0.25;
while (y < 6.3) {
z1 = func(x,y);
z2 = func(x+dx,y);
z3 = func(x+dx,y+dy);
z4 = func(x,y+dy);
c1 = (int) ((z1 + 1.0)*120) + 16;
if (c1 < 16) c1 = 16;
if (c1 > 254) c1 = 254;
c2 = (int) ((z2 + 1.0)*120) + 16;
if (c2 < 16) c2 = 16;
if (c2 > 254) c2 = 254;
c3 = (int) ((z3 + 1.0)*120) + 16;
if (c3 < 16) c3 = 16;
if (c3 > 254) c3 = 254;
c4 = (int) ((z4 + 1.0)*120) + 16;
if (c4 < 16) c4 = 16;
if (c4 > 254) c4= 254;
p3.interpquad(x,y,z1,(byte) c1,
x+dx,y,z2,(byte) c2,
x+dx,y+dy,z3,(byte) c3,
x,y+dy,z4,(byte) c4);
y = y + dy;
}
x = x + dx;
}
/* Make a GIF file */
f.writeGIF(cm,"plot.gif");
System.out.println("Image written to 'plot.gif'");
}
}
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