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Add slope equation constant parsing functionality.

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Nev3r 2021-06-02 10:58:36 +02:00
parent 8cb62eeca5
commit 36ce44e0a3
2 changed files with 41 additions and 0 deletions
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40
src/p_slopes.c
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@ -90,6 +90,36 @@ static void ReconfigureViaVertexes (pslope_t *slope, const vector3_t v1, const v
}
}
/// Setup slope via constants.
static void ReconfigureViaConstants (pslope_t *slope, const fixed_t a, const fixed_t b, const fixed_t c, const fixed_t d)
{
fixed_t m;
vector3_t *normal = &slope->normal;
// Set origin.
FV3_Load(&slope->o, 0, 0, c ? -FixedDiv(d, c) : 0);
// Get slope's normal.
FV3_Load(normal, a, b, c);
FV3_Normalize(normal);
// Invert normal if it's facing down.
if (normal->z < 0)
FV3_Negate(normal);
// Get direction vector
m = FixedHypot(normal->x, normal->y);
slope->d.x = -FixedDiv(normal->x, m);
slope->d.y = -FixedDiv(normal->y, m);
// Z delta
slope->zdelta = FixedDiv(m, normal->z);
// Get angles
slope->xydirection = R_PointToAngle2(0, 0, slope->d.x, slope->d.y)+ANGLE_180;
slope->zangle = InvAngle(R_PointToAngle2(0, 0, FRACUNIT, slope->zdelta));
}
/// Recalculate dynamic slopes.
void T_DynamicSlopeLine (dynplanethink_t* th)
{
@ -631,6 +661,16 @@ pslope_t *P_SlopeById(UINT16 id)
return ret;
}
/// Creates a new slope from equation constants.
pslope_t *MakeViaEquationConstants(const fixed_t a, const fixed_t b, const fixed_t c, const fixed_t d)
{
pslope_t* ret = Slope_Add(0);
ReconfigureViaConstants(ret, a, b, c, d);
return ret;
}
/// Initializes and reads the slopes from the map data.
void P_SpawnSlopes(const boolean fromsave) {
size_t i;

1
src/p_slopes.h
View file

@ -87,6 +87,7 @@ fixed_t P_GetWallTransferMomZ(mobj_t *mo, pslope_t *slope);
void P_HandleSlopeLanding(mobj_t *thing, pslope_t *slope);
void P_ButteredSlope(mobj_t *mo);
pslope_t *MakeViaEquationConstants(const fixed_t a, const fixed_t b, const fixed_t c, const fixed_t d);
/// Dynamic plane type enum for the thinker. Will have a different functionality depending on this.
typedef enum {