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This commit is contained in:
olikraus 2016-04-17 15:45:56 +02:00
parent 5e17478209
commit 69316e46c6
1 changed files with 13 additions and 0 deletions
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13
csrc/u8g2_intersection.c
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@ -58,6 +58,19 @@
*/
/*
calculate the intersection between a0/a1 and v0/v1
The intersection check returns one if the range of a0/a1 has an intersection with v0/v1.
The intersection check includes the boundary values a0 and a1.
The following asserts will succeed:
assert( u8g2_is_intersection_decision_tree(4, 6, 7, 9) == 0 );
assert( u8g2_is_intersection_decision_tree(4, 6, 6, 9) != 0 );
assert( u8g2_is_intersection_decision_tree(6, 9, 4, 6) != 0 );
assert( u8g2_is_intersection_decision_tree(7, 9, 4, 6) == 0 );
*/
//static uint8_t U8G2_ALWAYS_INLINE u8g2_is_intersection_decision_tree(u8g_uint_t a0, u8g_uint_t a1, u8g_uint_t v0, u8g_uint_t v1)
static uint8_t u8g2_is_intersection_decision_tree(u8g2_uint_t a0, u8g2_uint_t a1, u8g2_uint_t v0, u8g2_uint_t v1)
{