Created
September 26, 2019 10:54
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typedef struct { | |
int x; | |
int y; | |
} Point; | |
typedef struct { | |
Point s; | |
Point e; | |
} Line; | |
Point LineLineIntersect(int x1, int y1, //Line 1 start | |
int x2, int y2, //Line 1 end | |
int x3, int y3, //Line 2 start | |
int x4, int y4 //Line 2 end | |
) | |
{ | |
Point result; | |
int detL1 = 0; | |
int detL2 = 0; | |
int x1mx2 = 0; | |
int x3mx4 = 0; | |
int y1my2 = 0; | |
int y3my4 = 0; | |
int xnom = 0; | |
int ynom = 0; | |
int denom = 0; | |
detL1 = x1 * y2 - y1 * x2; | |
detL2 = x3 * y4 - y3 * x4; | |
x1mx2 = x1 - x2; | |
x3mx4 = x3 - x4; | |
y1my2 = y1 - y2; | |
y3my4 = y3 - y4; | |
xnom = detL1 * x3mx4 - x1mx2 * detL2; | |
ynom = detL1 * y3my4 - y1my2 * detL2; | |
denom = x1mx2 * y3my4 - y1my2 * x3mx4; | |
if (denom == 0) { | |
// Lines don't seem to cross | |
result.x = 99999; | |
result.y = 99999; | |
return result; | |
} | |
result.x = xnom / denom; | |
result.y = ynom / denom; | |
return result; | |
} | |
Point mpc_main(Line INPUT_A, Line INPUT_B) { | |
return LineLineIntersect(INPUT_A.s.x, INPUT_A.s.y, INPUT_A.e.x, INPUT_A.e.y, | |
INPUT_B.s.x, INPUT_B.s.y, INPUT_B.e.x, INPUT_B.e.y); | |
} |
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