rollercoaster.h

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/* 
 * File:   rollercoaster.h
 * Author: kristofer
 *
 * Created on July 18, 2017, 9:40 PM
 */

#ifndef ROLLERCOASTER_H
#define ROLLERCOASTER_H

#endif /* ROLLERCOASTER_H */
typedef union Vector3{
    struct{
        float x,y,z;
    };
    float coord[3];
}vector3;

static void myDisplay(void);
static void myTimer(int value);
static void myKey(unsigned char key, int x, int y);
static void keyPress(int key, int x, int y);
static void keyRelease(int key, int x, int y);
static void myReshape(int w, int h);

static void init(void);

static void drawText(double x, double y, char *text);
static void drawBox(float x, float y, float z);

void q(const vector3* list, float t, int derivation, vector3* result);
float uniformBSpline(float p0, float p1, float p2, float p3, float t);
float uniformBSplineDerivative(float p0, float p1, float p2, float p3, float t);
float uniformBSplineSecondDerivative(float p0, float p1, float p2, float p3, float t);
void drawCoasterPath();
int findCenterOf3DObject(vector3 smallest, vector3 largest, vector3* middle);
//void drawSkyAndGround();

void crossProduct(const vector3* a, const vector3* b, vector3* result);
float vectorMagnitude(const vector3* v);
void normalizeVector(vector3* v);
void scale(vector3* v, float amount);
void calculateUpVector(const vector3* r, const vector3* s, vector3* up);
vector3 negativeVector(vector3 v);
void vectorAdd_Sub(vector3* affected, const vector3* effector, int flag);
float distanceBetweenPoints(const vector3* curr, const vector3* prev);