| 1 | /* |
|---|
| 2 | * see COPYRIGHT |
|---|
| 3 | */ |
|---|
| 4 | |
|---|
| 5 | |
|---|
| 6 | /* |
|---|
| 7 | * Screen for drawing the Bezier curves in text mode |
|---|
| 8 | */ |
|---|
| 9 | |
|---|
| 10 | struct screen { |
|---|
| 11 | unsigned physx; |
|---|
| 12 | unsigned physy; |
|---|
| 13 | unsigned cols; |
|---|
| 14 | unsigned rows; |
|---|
| 15 | unsigned xoff; |
|---|
| 16 | unsigned yoff; |
|---|
| 17 | unsigned minx; |
|---|
| 18 | unsigned miny; |
|---|
| 19 | char *dots; |
|---|
| 20 | double xscale; |
|---|
| 21 | double yscale; |
|---|
| 22 | } screen; |
|---|
| 23 | |
|---|
| 24 | #define screenabsdot(x,y) (screen.dots[(y)*screen.cols+(x)]) |
|---|
| 25 | #define screendot(x,y) screenabsdot((x)+screen.xoff, (y)+screen.yoff) |
|---|
| 26 | |
|---|
| 27 | /* prototypes */ |
|---|
| 28 | double fmin(double a, double b); |
|---|
| 29 | int abs(int x); |
|---|
| 30 | void initscreen(unsigned physx, unsigned physy, |
|---|
| 31 | unsigned cols, unsigned rows, unsigned xoff, unsigned yoff, |
|---|
| 32 | unsigned minx, unsigned miny, unsigned maxx, unsigned maxy); |
|---|
| 33 | void drawcurve(int mark, int ax,int ay, |
|---|
| 34 | int bx,int by, int cx,int cy, int dx,int dy); |
|---|
| 35 | void drawcurvedir(int mark, int ax,int ay, |
|---|
| 36 | int bx,int by, int cx,int cy, int dx,int dy); |
|---|
| 37 | void drawdot(int mark, int x, int y); |
|---|
| 38 | void setabsdot(int mark, int x, int y); |
|---|
| 39 | void setfdot(int mark, double x, double y); |
|---|
| 40 | void printscreen(FILE *f); |
|---|
