This library contains functions to animate moving (expanding or contracting) rectangles. The following routines are available for this purpse:
| • xgrf_2box | Animation of moving rectangles |
| • xgrf_stepcalc | Parameter calculation for rectangle animation |
Note: These functions should be seen primarily as replacements for the functions graf_growbox and graf_shrinkbox, that in PC-GEM were a casualty of the legal dispute between Apple and Digital Research.
See Also: graf_growbox graf_shrinkbox Style guidelines
| Name: | »Animate rectangles« - Draw a set of moving
rectangles. | ||||||||||||||||||||||||||||||
| Opcode: | 131 | ||||||||||||||||||||||||||||||
| Syntax: | int16_t xgrf_2box ( int16_t cx, int16_t cy, int16_t w, int16_t
h, int16_t corners, int16_t cnt, int16_t xstep, int16_t ystep, int16_t
doubled ); | ||||||||||||||||||||||||||||||
| Description: | The call xgrf_2box draws a set of rectangles that move on the
screen. The following apply:
Note: The function is a replacement for the deleted functions of the FORM and GRAF libraries in PC-GEM (due to the legal dispute between Apple and Digital Research). | ||||||||||||||||||||||||||||||
| Return value: | This is unknown at present. | ||||||||||||||||||||||||||||||
| Availability: | The function is available only as of PC-GEM 2.0, as of
KAOS 1.4.2 and MagiC. | ||||||||||||||||||||||||||||||
| Group: | Extended graphics library | ||||||||||||||||||||||||||||||
| See Also: | Binding xgrf_stepcalc MagiC |
| C: | int16_t xgrf_2box ( int16_t cx, int16_t cy, int16_t w, int16_t
h, int16_t corners, int16_t cnt, int16_t xstep, int16_t ystep, int16_t
doubled ); | ||||||||||||||||||||||||||||||||||||||||||||||||
| Binding: | int16_t xgrf_2box ( int16_t cx, int16_t cy, int16_t w, int16_t h, int16_t corners, int16_t cnt, int16_t xstep, int16_t ystep, int16_t doubled ) { int_in[0] = cnt; int_in[1] = xstep; int_in[2] = ystep; int_in[3] = doubled; int_in[4] = corners; int_in[5] = cx; int_in[6] = cy; int_in[7] = w; int_in[8] = h; return ( crys_if(131) ); } | ||||||||||||||||||||||||||||||||||||||||||||||||
| GEM-Arrays: |
|
| Name: | »Stepcalc for XGraf« - Parameter calculation for the
animation of rectangles. | ||||||||||||||||||||||||||
| Opcode: | 130 | ||||||||||||||||||||||||||
| Syntax: | int16_t xgrf_stepcalc ( int16_t orgw, int16_t orgh, int16_t
xc, int16_t yc, int16_t w, int16_t h, int16_t *pcx, int16_t *pcy,
int16_t *pcnt, int16_t *pxstep, int16_t *pystep ); | ||||||||||||||||||||||||||
| Description: | The call xgrf_stepcalc calculates all parameters for a call of
xgrf_2box. The following apply:
Note: The centred position, number of steps as well as step size are calculated from the starting size, final size and the end positions of the rectangle. | ||||||||||||||||||||||||||
| Return value: | This is unknown at present. | ||||||||||||||||||||||||||
| Availability: | The function is available only as of PC-GEM 2.0, as of
KAOS 1.4.2 and MagiC. | ||||||||||||||||||||||||||
| Group: | Extended graphics library | ||||||||||||||||||||||||||
| See Also: | Binding xgrf_2box MagiC |
| C: | int16_t xgrf_stepcalc ( int16_t orgw, int16_t orgh, int16_t
xc, int16_t yc, int16_t w, int16_t h, int16_t *pcx, int16_t *pcy,
int16_t *pcnt, int16_t *pxstep, int16_t *pystep ); | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Binding: | int16_t xgrf_stepcalc ( int16_t orgw, int16_t orgh, int16_t xc, int16_t yc, int16_t w, int16_t h, int16_t *pcx, int16_t *pcy, int16_t *pcnt, int16_t *pxstep, int16_t *pystep ) { int_in[0] = orgw; int_in[1] = orgh; int_in[2] = xc; int_in[3] = yc; int_in[4] = w; int_in[5] = h; crys_if (130); *pcx = int_out[1]; *pcy = int_out[2]; *pcnt = int_out[3]; *pxstep = int_out[4]; *pystep = int_out[5]; return ( int_out[0] ); } | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| GEM-Arrays: |
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