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Rename quadratic equation variables

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This commit is contained in:
Sebastian Mischke 2026-01-04 21:46:44 +01:00
parent eec2d72841
commit d57fb07a20
1 changed files with 11 additions and 10 deletions
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21
LEGO1/lego/sources/roi/legoroi.cpp
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@ -707,12 +707,13 @@ LegoU32 LegoROI::Intersect(
v1 -= GetWorldBoundingSphere().Center(); v1 -= GetWorldBoundingSphere().Center();
float radius = GetWorldBoundingSphere().Radius(); float radius = GetWorldBoundingSphere().Radius();
// Quadratic equation to solve for ray-sphere intersection: at^2 + bt + c = 0
float a = p_v2.Dot(p_v2, p_v2); float a = p_v2.Dot(p_v2, p_v2);
float b = p_v2.Dot(p_v2, v1) * 2.0f; float b = p_v2.Dot(p_v2, v1) * 2.0f;
float c = v1.Dot(v1, v1) - (radius * radius); float c = v1.Dot(v1, v1) - (radius * radius);
if (a >= 0.001 || a <= -0.001) { if (a >= 0.001 || a <= -0.001) {
float local1c = -1.0f; float distance = -1.0f;
float discriminant = (b * b) - (c * a * 4.0f); float discriminant = (b * b) - (c * a * 4.0f);
if (discriminant >= -0.001) { if (discriminant >= -0.001) {
@ -721,26 +722,26 @@ LegoU32 LegoROI::Intersect(
if (discriminant > 0.0f) { if (discriminant > 0.0f) {
discriminant = sqrt(discriminant); discriminant = sqrt(discriminant);
float local184 = (b + discriminant) / a; float root1 = (b + discriminant) / a;
float local188 = (b - discriminant) / a; float root2 = (b - discriminant) / a;
if (local184 > 0.0f && local188 > local184) { if (root1 > 0.0f && root2 > root1) {
local1c = local184; distance = root1;
} }
else if (local188 > 0.0f) { else if (root2 > 0.0f) {
local1c = local188; distance = root2;
} }
else { else {
return 0; return 0;
} }
} }
else { else {
local1c = b / a; distance = b / a;
} }
if (local1c >= 0.0f && p_f1 >= local1c) { if (distance >= 0.0f && p_f1 >= distance) {
p_v3 = p_v2; p_v3 = p_v2;
p_v3 *= local1c; p_v3 *= distance;
p_v3 += p_v1; p_v3 += p_v1;
return 1; return 1;
} }