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Vector orthogonalization

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This commit is contained in:
Valeriano A.R.
2014-07-16 01:12:58 +02:00
committed by Valeriano A.R
parent 1996b820a7
commit 5013c7a377
2 changed files with 57 additions and 0 deletions
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54
GameLib/Util.c
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@@ -17,6 +17,60 @@ float vec2_norm(vec2 v){
return(len);
}
void vec2_orthogonalize4(vec2 v) {
if (fabs(v[0]) > fabs(v[1])) {
if (v[0] >= 0) {
v[0] = 1.0f;
v[1] = 0.0f;
} else {
v[0] = -1.0f;
v[1] = 0.0f;
}
} else {
if (v[1] >= 0) {
v[1] = 1.0f;
v[0] = 0.0f;
} else {
v[1] = -1.0f;
v[0] = 0.0f;
}
}
}
void vec2_orthogonalize8(vec2 v) {
float diff = fabs(fabs(v[0]) - fabs(v[1]));
if (diff > 0.2f) {
if (fabs(v[0]) > fabs(v[1])) {
if (v[0] >= 0) {
v[0] = 1.0f;
v[1] = 0.0f;
} else {
v[0] = -1.0f;
v[1] = 0.0f;
}
} else {
if (v[1] >= 0) {
v[1] = 1.0f;
v[0] = 0.0f;
} else {
v[1] = -1.0f;
v[0] = 0.0f;
}
}
} else {
if (v[0] > 0.0f) {
v[0] = 0.707f;
} else {
v[0] = -0.707f;
}
if (v[1] > 0.0f) {
v[1] = 0.707f;
} else {
v[1] = -0.707f;
}
}
}
/////////////////////////////
// SolveQuadratic

3
GameLib/Util.h
View File

@@ -29,6 +29,9 @@ float vec2_norm(vec2 v);
#define vec2_interpol(v,v1,v2,f) \
(v)[0]=(v1)[0]-f*((v1)[0]-(v2)[0]);\
(v)[1]=(v1)[1]-f*((v1)[1]-(v2)[1]);
void vec2_orthogonalize4(vec2 v);
void vec2_orthogonalize8(vec2 v);
/////////////////////////////