MouseController.cpp

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/*  Project nGenEx
        Destroyer Studios LLC
        Copyright © 1997-2004. All Rights Reserved.

        SUBSYSTEM:    nGenEx.lib
        FILE:         MouseController.cpp
        AUTHOR:       John DiCamillo


        OVERVIEW
        ========
        MouseController Input class
*/

#include "MemDebug.h"
#include "MouseController.h"
#include "Keyboard.h"
#include "Mouse.h"
#include "Game.h"
#include "Video.h"

// +--------------------------------------------------------------------+

static MouseController* instance = 0;
static DWORD rbutton_latch       = 0;
static DWORD mbutton_latch       = 0;
static DWORD active_latch        = 0;

// +--------------------------------------------------------------------+

MouseController::MouseController()
: p(0), r(0), w(0), dx(0), dy(0), t(0)
{
        instance    = this;
        select      =   0;
        sensitivity =  10;
        swapped     =   0;
        active      = false;

        active_key  = 20; // caps lock

        rbutton_latch = 0;

        for (int i = 0; i < MotionController::MaxActions; i++)
        action[i] = 0;
}

MouseController::~MouseController()
{
        instance = 0;
}

MouseController*
MouseController::GetInstance()
{
        return instance;
}

// +--------------------------------------------------------------------+

void
MouseController::MapKeys(KeyMapEntry* mapping, int nkeys)
{
        for (int i = 0; i < nkeys; i++) {
                KeyMapEntry k = mapping[i];

                if (k.act >= KEY_MAP_FIRST && k.act <= KEY_MAP_LAST) {

                        if (k.act == KEY_MOUSE_SENSE)
                        sensitivity = k.key;

                        else if (k.act == KEY_MOUSE_SWAP)
                        swapped = k.key;

                        else if (k.act == KEY_MOUSE_INVERT)
                        inverted = k.key;

                        else if (k.act == KEY_MOUSE_SELECT)
                        select = k.key;

                        else if (k.act == KEY_MOUSE_ACTIVE)
                        active_key = k.key;
                }
        }
}

// +--------------------------------------------------------------------+

static inline double sqr(double a) { return a*a; }

void
MouseController::Acquire()
{
        p = r = w = 0;
        action[0] = 0;
        action[1] = 0;
        action[2] = 0;
        action[3] = 0;

        if (active_key && Keyboard::KeyDown(active_key)) {
                active_latch = 1;
        }
        else {
                if (active_latch) {
                        active_latch = 0;
                        active = !active;
                }
        }

        if (!select || !active)
        return;

        action[0] = Mouse::LButton();

        int roll_enable = 0;

        if (Mouse::RButton()) {
                roll_enable = 1;

                if (!rbutton_latch)
                rbutton_latch = Game::RealTime();
        }
        else {
                if (rbutton_latch) {
                        rbutton_latch = Game::RealTime() - rbutton_latch;
                        if (rbutton_latch < 250)
                        action[1] = 1;
                }

                rbutton_latch = 0;
        }

        if (Mouse::MButton()) {
                if (!mbutton_latch)
                mbutton_latch = Game::RealTime();
        }
        else {
                if (mbutton_latch) {
                        action[3] = 1;
                }

                mbutton_latch = 0;
        }

        double   step = 0;
        int      cx   = Video::GetInstance()->Width()/2;
        int      cy   = Video::GetInstance()->Height()/2;

        dx += Mouse::X() - cx;
        dy += Mouse::Y() - cy;

        step = fabs(dx)/cx;

        if (roll_enable || select == 1)
        step *= 3 * sensitivity;
        else
        step *= step * sensitivity/4;

        if (roll_enable) {
                if (dx > 0)
                r = -step;
                else if (dx < 0)
                r =  step;
        }
        else {
                if (dx > 0)
                w =  step;
                else if (dx < 0)
                w = -step;
        }

        step = fabs(dy)/cy;

        if (select == 1)
        step *= 2 * sensitivity;
        else
        step *= step * sensitivity/4;

        if (inverted) {
                step *= -1;
        }

        if (dy > 0)
        p  = step;
        else if (dy < 0)
        p = -step;

        if (select == 1) {
                ::SetCursorPos(cx, cy);

                double drain = cx * 4 * Game::FrameTime();

                if (dx > drain) {
                        dx -= drain;
                }
                else if (dx < -drain) {
                        dx += drain;
                }
                else {
                        dx = 0;
                }

                if (dy > drain) {
                        dy -= drain;
                }
                else if (dy < -drain) {
                        dy += drain;
                }
                else {
                        dy = 0;
                }
        }
        else {
                dx = 0;
                dy = 0;
        }

        if (Mouse::Wheel() > 0) {
                if (t < 0.25)
                t += 0.025;
                else
                t += 0.1;

                if (t > 1) t = 1;
        }

        else if (Mouse::Wheel() < 0) {
                if (t < 0.25)
                t -= 0.025;
                else
                t -= 0.1;

                if (t < 0) t = 0;
        }
}

// +--------------------------------------------------------------------+

int
MouseController::ActionMap(int n)
{
        if (n >= KEY_ACTION_0 && n <= KEY_ACTION_3)
        return action[n - KEY_ACTION_0];

        return 0;
}