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/* XPaint-image */
#include <Xpaint.h>
#include <Xpaint3d.h>
/* Sinusoidal circular waves */
void waves(point p, double x, double y)
{
p[0] = x;
p[1] = y;
p[2] = -0.1*cos(sqrt(x*x+y*y)*15)/(1+x*x+y*y);
}
Image * ImageCreate()
{
Image * image;
unsigned char * p;
int x, y, i, j;
width = 640;
height = 480;
x_1 = -2.4; x_2 = 2.4;
y_1= -1.8; y_2 = 1.8;
z_1 = -1.8; z_2 = 1.8;
light_x = -0.3; light_y = -0.5; light_z = -1.1;
create_3d_buffer();
rotation_angles(0, 20, -60);
surface(waves, -2.8, 2.8, 250, -2.8, 2.8, 250);
image = ImageNew(width, height);
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
p = ImagePixel(image, x, y);
i = x+y*width;
if (luminosity[i]) {
p[2] = luminosity[i]>>8;
p[0] = (3*p[2]+125)/4;
p[1] = (2*p[2]+205)/3;
} else {
p[0] = 255;
p[1] = 255;
p[2] = 255;
}
}
}
free_3d_buffer();
return image;
}
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