libretro/scummvm
1
0
Fork 0
mirror of https://github.com/libretro/scummvm.git synced 2025-01-09 03:10:22 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ZVISION: Fix the quadrant numbers in angle calculations

Browse Source 
Because y increases as you go down, not up
This commit is contained in:
richiesams 2013-08-28 09:12:14 -05:00
parent 3a9b384114
commit ab18d20ead
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
engines/zvision/lever_control.cpp
View File

@ -233,7 +233,7 @@ int LeverControl::calculateVectorAngle(const Common::Point &pointOne, const Comm
if (pointOne.x == pointTwo.x && pointOne.y == pointTwo.y)
return -1; // This should never happen
else if (pointOne.x == pointTwo.x) {
if (pointTwo.y > pointOne.y)
if (pointTwo.y < pointOne.y)
return 90;
else
return 270;
@ -279,15 +279,15 @@ int LeverControl::calculateVectorAngle(const Common::Point &pointOne, const Comm
// \ | /
// \ | /
// \ | /
// Quadrant 3 \ | / Quadrant 2
// Quadrant 1 \ | / Quadrant 0
// \ | /
// \ | /
// -angle ( \|/ ) angle
// angle ( \|/ ) -angle
// 180 <----------------------------------------> 0
// angle ( /|\ ) -angle
// -angle ( /|\ ) angle
// / | \
// / | \
// Quadrant 1 / | \ Quadrant 0
// Quadrant 3 / | \ Quadrant 2
// / | \
// / | \
// / | \
@ -298,16 +298,16 @@ int LeverControl::calculateVectorAngle(const Common::Point &pointOne, const Comm
// Convert the local angles to unit circle angles
switch (quadrant) {
case 0:
angle = 360 + angle;
angle = 180 + angle;
break;
case 1:
angle = 180 + angle;
// Do nothing
break;
case 2:
angle = 180 + angle;
break;
case 3:
// Do nothing
angle = 360 + angle;
break;
}