mirror of https://github.com/n64decomp/mk64.git
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
#ifndef SPLINE_H
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#define SPLINE_H
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#include "common_structs.h"
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/*
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These are some very good videos about splines/Bezier curves in general
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The Beauty of Bezier Curves
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https://www.youtube.com/watch?v=aVwxzDHniEw
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The Continuity of Splines
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https://www.youtube.com/watch?v=jvPPXbo87ds
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*/
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/*
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This stuff is all about the b-splines used objects like Lakitu and the Boos on Banshee Boardwalk
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For splines used during the award ceremony and credits, see src/ending/ceremony_and_credits.h
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*/
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typedef struct {
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/* 0x0 */ Vec3s pos;
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// Don't really know what to call this member.
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// It somehow controls the speed of travel along a segment of the spline but I don't really get how it works
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/* 0x6 */ s16 velocity;
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} SplineControlPoint; // size = 0x8
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// WARNING!!!
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// You really, really shouldn't use this type for actual spline data. This is intended as a generic SplineData
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// type. I would use a union, but that would cause significant ugliness elsewhere in the codebase
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typedef struct {
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// This name is a little misleading
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// The control point arrays have more control points in them than this number indicates. Not sure why though.
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s16 numControlPoints;
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// This has to be an array for this to work, so just make it size 1
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SplineControlPoint controlPoints[1];
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} SplineData;
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// All other SplineDataXX types are for use as data only. The size of the array in them matters a lot.
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// But object structs should never have members with these types, just use the plain SplineData type
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// Ghosts in BansheeBoardwalk x 2
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// Seagulls in KoopaTroopaBeach x 2
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// Penguins in Sherbet Land x 1
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[23];
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} SplineData23;
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// Ghosts in BansheeBoardwalk x 2
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// Seagulls in KoopaTroopaBeach x 1
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[24];
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} SplineData24;
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// Ghosts in BansheeBoardwalk x 1
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// Seagulls in KoopaTroopaBeach x 1
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// Penguins in Sherbet Land x 1
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[25];
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} SplineData25;
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// Data of this type is unreferenced or only referenced in an unused function
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[4];
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} SplineDataUnused4;
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// Lakitu Countdown
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[15];
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} SplineData15;
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// Lakitu Checkered Flag
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[21];
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} SplineData21;
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[13];
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} SplineDataUnused13;
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// Lakitu Second/Final Lap
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[12];
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} SplineData12;
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// Lakitu Reverse
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typedef struct {
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s16 numControlPoints;
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SplineControlPoint controlPoints[8];
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} SplineData8;
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#endif
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