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Dependencies: RTC-DS1307 SPI_TFT_ILI9341 TFT_fonts mbed tsi_sensor
Fork of
TFT_Mikroelectronika_IL9341_sketchpad
by 
Oxford CWM Team
Diff: drawhands.h
- Revision:
- 39:4b70d28cb273
- Parent:
- 38:3fe3bafbf0c7
- Child:
- 41:3f2e75e7fbeb
--- a/drawhands.h Thu May 25 19:54:51 2017 +0000
+++ b/drawhands.h Fri May 26 08:28:27 2017 +0000
@@ -1,18 +1,19 @@
+//early version of the analog clock draw function
void draw_hands ( int x0 , int y0 , int r , float minutes , int hours , int color)
{
int x1,y1,x2,y2;
int rs = 0.6 * r ; // shorter moving hand
- int m = minutes ;
- int k = hours % 12;
- double angle2 = k * M_PI / 6 ;
+ int m = minutes ; // minutes
+ int k = hours % 12; // hours
+ double angle2 = k * M_PI / 6 ; // scaling
double angle = m * M_PI / 30 ;
- x1 = rs * sin(angle) + x0;
+ x1 = rs * sin(angle) + x0; // trigonometric functions to get values
y1 = rs * cos(angle) + y0;
x2 = r * sin(angle2) + x0;
y2 = r * cos(angle2) + y0;
- TFT.line(x0, y0, x2, y2, color);
- TFT.line(x0, y0, x1, y1, color);
+ TFT.line(x0, y0, x2, y2, color); //draw line
+ TFT.line(x0, y0, x1, y1, color); //draw line
}