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implemented gdispDrawArc() by noether

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Tectu 2012-08-28 16:24:00 +02:00
parent 8fd1de6ef5
commit 2c7cbc1dd7
1 changed files with 91 additions and 8 deletions
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97
src/gdisp.c
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@ -659,6 +659,84 @@ void gdispDrawBox(coord_t x, coord_t y, coord_t cx, coord_t cy, color_t color) {
} }
} }
void _draw_arc(int x, int y, int start, int end, int radius, color_t color) {
if (start >= 0 && start <= 180)
{
float x_maxI = x + radius*cos(start*M_PI/180);
float x_minI;
if (end > 180)
x_minI = x - radius;
else
x_minI = x + radius*cos(end*M_PI/180);
int a = 0;
int b = radius;
int P = 1 - radius;
do
{
if(x-a <= x_maxI && x-a >= x_minI)
gdispDrawPixel(x-a, y+b, color);
if(x+a <= x_maxI && x+a >= x_minI)
gdispDrawPixel(x+a, y+b, color);
if(x-b <= x_maxI && x-b >= x_minI)
gdispDrawPixel(x-b, y+a, color);
if(x+b <= x_maxI && x+b >= x_minI)
gdispDrawPixel(x+b, y+a, color);
if (P < 0)
{
P = P + 3 + 2*a;
a = a + 1;
}else
{
P = P + 5 + 2*(a - b);
a = a + 1;
b = b - 1;
}
}while(a <= b);
}
if (end > 180 && end <= 360)
{
float x_maxII = x+radius*cos(end*M_PI/180);
float x_minII;
if(start <= 180)
x_minII = x - radius;
else
x_minII = x+radius*cos(start*M_PI/180);
int a = 0;
int b = radius;
int P = 1 - radius;
do{
if(x-a <= x_maxII && x-a >= x_minII)
gdispDrawPixel(x-a, y-b, color);
if(x+a <= x_maxII && x+a >= x_minII)
gdispDrawPixel(x+a, y-b, color);
if(x-b <= x_maxII && x-b >= x_minII)
gdispDrawPixel(x-b, y-a, color);
if(x+b <= x_maxII && x+b >= x_minII)
gdispDrawPixel(x+b, y-a, color);
if (P < 0)
{
P = P + 3 + 2*a;
a = a + 1;
}
else
{
P = P + 5 + 2*(a - b);
a = a + 1;
b = b - 1;
}
}while (a <= b);
}
}
/* /*
* @brief Draw an arc. * @brief Draw an arc.
* @pre The GDISP must be in powerOn or powerSleep mode. * @pre The GDISP must be in powerOn or powerSleep mode.
@ -672,13 +750,12 @@ void gdispDrawBox(coord_t x, coord_t y, coord_t cx, coord_t cy, color_t color) {
* @api * @api
*/ */
void gdispDrawArc(coord_t x, coord_t y, coord_t radius, uint16_t start, uint16_t end, color_t color) { void gdispDrawArc(coord_t x, coord_t y, coord_t radius, uint16_t start, uint16_t end, color_t color) {
uint16_t i; if (end < start) {
float step = 0.01; _draw_arc(x, y, start, 360, radius, color);
_draw_arc(x, y, 0, end, radius, color);
for(i = 0; i <= (int)((abs(end-start)) / step); i++) {
gdispDrawPixel( ((float)x + (float)radius * cosf((float)start * M_PI / 180.0f) + (float)i * step * M_PI / 180.0f),
((float)y + (float)radius * sinf((float)start * M_PI / 180.0f) + (float)i * step * M_PI / 180.0f), color);
} }
else
_draw_arc(x, y, start, end, radius, color);
} }
/* /*
@ -694,7 +771,13 @@ void gdispDrawArc(coord_t x, coord_t y, coord_t radius, uint16_t start, uint16_t
* @api * @api
*/ */
void gdispFillArc(coord_t x, coord_t y, coord_t radius, uint16_t start, uint16_t end, color_t color) { void gdispFillArc(coord_t x, coord_t y, coord_t radius, uint16_t start, uint16_t end, color_t color) {
/* ToDo */
(void)x;
(void)y;
(void)radius;
(void)start;
(void)end;
(void)color;
} }
#if GDISP_NEED_TEXT || defined(__DOXYGEN__) #if GDISP_NEED_TEXT || defined(__DOXYGEN__)