void
BWDrawRectangle(Widget w,
Position from_x, Position from_y,
Position to_x, Position to_y, int value)
{
register Position i;
Dimension delta, width, height;
QuerySwap(from_x, to_x);
QuerySwap(from_y, to_y);
width = to_x - from_x;
height = to_y - from_y;
delta = max(width, height);
if (!QueryZero(width, height)) {
for (i = 0; (int)i < (int)delta; i++) {
if ((int)i < (int)width) {
BWDrawPoint(w, from_x + i, from_y, value);
BWDrawPoint(w, to_x - i, to_y, value);
}
if ((int)i < (int)height) {
BWDrawPoint(w, from_x, to_y - i, value);
BWDrawPoint(w, to_x, from_y + i, value);
}
}
}
else
BWDrawLine(w,
from_x, from_y,
to_x, to_y, value);
}
void
BWBlindLine(Widget w,
Position from_x, Position from_y,
Position to_x, Position to_y, int value)
{
Position i;
register double x, y;
double dx, dy, delta;
dx = to_x - from_x;
dy = to_y - from_y;
x = from_x + 0.5;
y = from_y + 0.5;
delta = max(abs(dx), abs(dy));
if (delta > 0) {
dx /= delta;
dy /= delta;
x += dx;
y += dy;
for(i = 1; i <= delta; i++) {
BWDrawPoint(w, (Position) x, (Position) y, value);
x += dx;
y += dy;
}
}
else
BWDrawPoint(w, from_x, from_y, value);
}
static void
DrawImageData(BitmapWidget BW, XImage *image,
Position at_x, Position at_y, int value)
{
Position x, y;
Boolean C, S, I, H;
bit A, B;
C = value == Clear;
S = value == Set;
I = value == Invert;
H = value == Highlight;
for (x = 0; x < image->width; x++)
for (y = 0; y < image->height; y++) {
A = GetBit(image, x, y);
B = GetBit(BW->bitmap.image, at_x + x, at_y + y);
if ((A & C) | ((A | B) & S) | ((A ^ B) & I) | ((A | B) & H))
value = (A & H) ? Highlight : Set;
else
value = Clear;
BWDrawPoint((Widget) BW,
at_x + x, at_y + y,
value);
}
}
void plotpart(part* p)
{
int x,y;
x=SCR_WIDTH*((p->pos.x)-left)/(right-left);
y=SCR_HEIGHT*((p->pos.y)-top)/(bottom-top);
BWDrawPoint(window1,x,y);
}
void
BWDrawFilledCircle(Widget w,
Position origin_x, Position origin_y,
Position point_x, Position point_y, int value)
{
register Position i, j, delta;
Dimension dx, dy;
double radius;
dx = abs(point_x - origin_x);
dy = abs(point_y - origin_y);
radius = sqrt((double) ((int)dx * (int)dx + (int)dy * (int)dy));
for(j = origin_x - (Position) floor(radius);
j <= origin_x + (Position) floor(radius); j++)
BWDrawPoint(w, j, origin_y, value);
for(i = 1; i <= (Position) floor(radius); i++) {
delta = sqrt(radius * radius - i * i);
for(j = origin_x - delta; j <= origin_x + delta; j++) {
BWDrawPoint(w, j, origin_y - i, value);
BWDrawPoint(w, j, origin_y + i, value);
}
}
}
void
BWDrawFilledRectangle(Widget w,
Position from_x, Position from_y,
Position to_x, Position to_y, int value)
{
register Position x, y;
QuerySwap(from_x, to_x);
QuerySwap(from_y, to_y);
for (x = from_x; x <= to_x; x++)
for (y = from_y; y <= to_y; y++)
BWDrawPoint(w, x, y, value);
}
void moveparts()
{
int i,j,new;
for (i=0; i<numps; i++) {
BWClearArea(window1,scrx(particle[i].pos),scry(particle[i].pos),1,1);
movepart(&particle[i]);
BWDrawPoint(window1,scrx(particle[i].pos),scry(particle[i].pos));
/* new=0;
for (j=0; j<numps; j++) {
if (j!=i)
if (Vequal(particle[i].pos,particle[j].pos))
new=1;
}
if (outofbounds(particle[i].pos))
new=1;
if (new==1)
randpart(&particle[i]);*/
}
}
void plotpart(part* p)
{
BWDrawPoint(window1,scrx(p->pos),scry(p->pos));
}
void
BWDrawCircle(Widget w,
Position origin_x, Position origin_y,
Position point_x, Position point_y, int value)
{
register Position i, delta;
Dimension dx, dy, half;
double radius;
dx = abs(point_x - origin_x);
dy = abs(point_y - origin_y);
radius = sqrt((double) ((int)dx * (int)dx + (int)dy * (int)dy));
if (radius < 1.0) {
BWDrawPoint(w, origin_x, origin_y, value);
}
else {
BWDrawPoint(w, origin_x - (Position) floor(radius), origin_y, value);
BWDrawPoint(w, origin_x + (Position) floor(radius), origin_y, value);
BWDrawPoint(w, origin_x, origin_y - (Position) floor(radius), value);
BWDrawPoint(w, origin_x, origin_y + (Position) floor(radius), value);
}
half = radius / sqrt(2.0);
for(i = 1; (int)i <= (int)half; i++) {
delta = sqrt(radius * radius - i * i);
BWDrawPoint(w, origin_x - delta, origin_y - i, value);
BWDrawPoint(w, origin_x - delta, origin_y + i, value);
BWDrawPoint(w, origin_x + delta, origin_y - i, value);
BWDrawPoint(w, origin_x + delta, origin_y + i, value);
if (i != delta) {
BWDrawPoint(w, origin_x - i, origin_y - delta, value);
BWDrawPoint(w, origin_x - i, origin_y + delta, value);
BWDrawPoint(w, origin_x + i, origin_y - delta, value);
BWDrawPoint(w, origin_x + i, origin_y + delta, value);
}
}
}
