flak_m/zscript/dt_coordutil.zsc
Marisa the Magician 602a89cc68 1.2 update w/ GZDoom 4.9 features:
- Changeable player skins.
 - Ammo LEDs are now 1:1 with UT by using canvas textures.
 - Integrate some add-ons, including reskins.
 - Various fixes (some backported from Demolitionist).
 - Migrated from libeye to Gutamatics.
2022-11-05 23:59:16 +01:00

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/*
Coordinate Utility helper class.
Reproduces the old UnrealScript Get(Un)Axes functions, providing XYZ axis
vectors relative to an euler rotation (defaults to left-handed coords).
Copyright (c)2018-2022 Marisa the Magician, UnSX Team
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
*/
Class dt_CoordUtil
{
// In Tim Sweeney's own words: "transform by a pitch-yaw-roll rotation"
static Vector3, Vector3, Vector3 GetUnAxes( double pitch, double yaw, double roll, bool rhand = false )
{
Vector3 x = (1,0,0), y = (0,rhand?1:-1,0), z = (0,0,1);
Vector3 a, b, c;
// pitch and roll in gzdoom work in reverse compared to UE
pitch = -pitch;
roll = -roll;
// yaw
a = (cos(yaw),sin(yaw),0);
b = (-sin(yaw),cos(yaw),0);
c = (0,0,1);
x = (x dot a, x dot b, x dot c);
y = (y dot a, y dot b, y dot c);
z = (z dot a, z dot b, z dot c);
// pitch
a = (cos(pitch),0,sin(pitch));
b = (0,1,0);
c = (-sin(pitch),0,cos(pitch));
x = (x dot a, x dot b, x dot c);
y = (y dot a, y dot b, y dot c);
z = (z dot a, z dot b, z dot c);
// roll
a = (1,0,0);
b = (0,cos(roll),-sin(roll));
c = (0,sin(roll),cos(roll));
x = (x dot a, x dot b, x dot c);
y = (y dot a, y dot b, y dot c);
z = (z dot a, z dot b, z dot c);
return x, y, z;
}
// In Tim Sweeney's own words: "detransform by a pitch-yaw-roll rotation"
static Vector3, Vector3, Vector3 GetAxes( double pitch, double yaw, double roll, bool rhand = false )
{
Vector3 x = (1,0,0), y = (0,rhand?1:-1,0), z = (0,0,1);
Vector3 a, b, c;
// pitch and roll in gzdoom work in reverse compared to UE
pitch = -pitch;
roll = -roll;
// inverse roll
a = (1,0,0);
b = (0,cos(roll),sin(roll));
c = (0,-sin(roll),cos(roll));
x = (x dot a, x dot b, x dot c);
y = (y dot a, y dot b, y dot c);
z = (z dot a, z dot b, z dot c);
// inverse pitch
a = (cos(pitch),0,-sin(pitch));
b = (0,1,0);
c = (sin(pitch),0,cos(pitch));
x = (x dot a, x dot b, x dot c);
y = (y dot a, y dot b, y dot c);
z = (z dot a, z dot b, z dot c);
// inverse yaw
a = (cos(yaw),-sin(yaw),0);
b = (sin(yaw),cos(yaw),0);
c = (0,0,1);
x = (x dot a, x dot b, x dot c);
y = (y dot a, y dot b, y dot c);
z = (z dot a, z dot b, z dot c);
return x, y, z;
}
}