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crosshair.cpp

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#include "crosshair.h"
#include <math.h>
#include "util.h"
#include "nncmath.h"
#include <iostream>

using namespace std;

Crosshair::Crosshair(ObjectManager &om) : GameObject(om, "Crosshair")
{
  SetLayer (10);

  vector <Surface *> v = Util_parseImage(CROSSHAIR_IMG_FILE);
  sprite = new Sprite(v, "Crosshair");

  sprite->SetFrame(15);

  radius = 1;
}

Crosshair::~Crosshair() 
{
}

int Crosshair::SetPosition(double x, double y) {
        if (!sprite) return 0;

        double oldx = Xpos;
        double oldy = Ypos;
        int xdif = abs((int)(oldx - x));
        int ydif = abs((int)(oldy - y));
        int currentFrame = sprite->GetFrame();
        static int counter = 0;

        // Call the game object default after 
        // the things we need.
        GameObject::SetPosition (x, y);

        return 1;
}

void Crosshair::think() {
        static nnctime old = Util_GetTime();
        static nnctime velTime = Util_GetTime();
        static double oldX = GetX();
        static double oldY = GetY();
        Uint32 ms = 50;
        int cFrame = sprite->GetFrame();
        static int maxFrame = sprite->CountFrames();
        int timePassed = Util_TimePassed(&old, ms);
        double newX = GetX();
        double newY = GetY();
        double diffX = newX - oldX;
        if (diffX < 0) diffX = -diffX;
        double diffY = newY - oldY;
        if (diffY < 0) diffY = -diffY;
        double distance = NNCMath::SRoot((diffX * diffX) + (diffY * diffY));
        nnctime time = Util_DiffTime(&velTime);
        double total_time = time.msecs + (time.secs / 1000);
        double velocity; 
        
        if (total_time != 0) velocity = distance / total_time;
        else velocity = 0.0;

        if (sprite) {
                if (diffX < 10 && diffY < 10) {
                        if (timePassed > 0 && cFrame == 0) timePassed = 0;
                //the crosshair hasn't moved much
                        switch(timePassed) {
                                //see if 500 ms have passed and how many times it has passed
                                case 0: break;
                                default:
                                        for (int i = cFrame; i > cFrame - timePassed &&  i >= 0; i--)
                                                (*sprite)--;
                                        break;
                        }       
                }

                else { //the crosshair has moved 
                        if (cFrame < maxFrame - 1) {
                                //not on the last frame (we don't want it to loop the frames back to 0)
                                if (velocity < 100) (*sprite)++;        
                                else if (velocity < 200) {
                                        //increase by 2 frames
                                        for (int i = 0; i < 2 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 300) {
                                        //increase by 3 frames
                                        for (int i = 0; i < 3 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 400) {
                                        //increase by 4 frames
                                        for (int i = 0; i < 4 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 500) {
                                        //increase by 5 frames
                                        for (int i = 0; i < 5 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 600) {
                                        //increase by 6 frames
                                        for (int i = 0; i < 6 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 700) {
                                        //increase by 7 frames
                                        for (int i = 0; i < 7 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 800) {
                                        //increase by 8 frames
                                        for (int i = 0; i < 8 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 900) {
                                        //increase by 9 frames
                                        for (int i = 0; i < 9 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else if (velocity < 1000) {
                                        //increase by 10 frames
                                        for (int i = 0; i < 10 && cFrame + i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                                else {
                                        //increase all the way
                                        for (int i = cFrame; i < maxFrame - 1; i++) {
                                                (*sprite)++;
                                        }
                                }
                        }
                }
        }
        oldX = newX;
        oldY = newY;    
        velTime = Util_GetTime();
}

int Crosshair::Recenter()
{
#if 1 
        // crosshair ignores the subworld coordinates
        if (sprite) {
                return sprite->SetPosition (GetX()-sprite->GetWidth()/2, GetY()-sprite->GetHeight()/2);
        }
        return 0;
#else
        return GameObject::Recenter();
#endif
}

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