Comp371Project/Mouse.cpp at master · angelagabereau/Comp371Project · GitHub

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#include "Mouse.h"

#define PI 3.1415926

using namespace std;

Mouse::Mouse()
{
    this->mouserdown = GL_FALSE;
    this->mouseldown = GL_FALSE;
    this->mousemdown = GL_FALSE;

    this->mouseX = 0;
    this->mouseY = 0;

    this->center[0] = 28.0;
    this->center[1] = 0.0;
    this->center[2] = 28.0;

    this->xRotate = PI/4;
    this->yRotate = PI/4;
    this->cenLength = 80.0f;

    this->mSpeed = 0.4;
    this->rSpeed = 0.02;
    this->lSpeed = 0.4;

}

Mouse::~Mouse()
{
    //dtor
}

// calculate the eye position according to center position, angle and length
void Mouse::calEyePosition()
{
    if(this->yRotate > PI/2.2)
        this->yRotate = PI/2.2;

    if(this->yRotate < 0.01)
        this->yRotate = 0.01;

    if(this->xRotate > 2*PI)
        this->xRotate = 0.01;

    if(this->xRotate < 0)
        this->xRotate = 2 * PI;

    if(this->cenLength > 100)
        this->cenLength = 100;

    if(this->cenLength < 5)
        this->cenLength = 5;

    this->eye[0] = this->center[0] + this->cenLength * sin(this->yRotate) * cos(this->xRotate);
    this->eye[2] = this->center[2] + this->cenLength * sin(this->yRotate) * sin(this->xRotate);
    this->eye[1] = this->center[1] + this->cenLength * cos(this->yRotate);

}

// center moves
void Mouse::moveBackward()
{
    this->center[0] += this->mSpeed * cos(this->xRotate);
    this->center[2] += this->mSpeed * sin(this->xRotate);
    this->calEyePosition();
}

void Mouse::moveForward()
{
    this->center[0] -= this->mSpeed * cos(this->xRotate);
    this->center[2] -= this->mSpeed * sin(this->xRotate);
    this->calEyePosition();
}

/// visual angle rotates
void Mouse::rotateLeft()
{
    this->xRotate -= this->rSpeed;
    this->calEyePosition();
}

void Mouse::rotateRight()
{
    this->xRotate += this->rSpeed;
    this->calEyePosition();
}

void Mouse::rotateUp()
{
    this->yRotate += this->rSpeed;
    this->calEyePosition();
}

void Mouse::rotateDown()
{
    this->yRotate -= this->rSpeed;
    this->calEyePosition();
}

/// call back func for mouse kicks
void Mouse::mouseFunc(int button, int state, int x, int y)
{
    if(state == GLUT_DOWN)
    {
        if(button == GLUT_RIGHT_BUTTON)
            this->mouserdown = GL_TRUE;
        if(button == GLUT_LEFT_BUTTON)
            this->mouseldown = GL_TRUE;
        if(button == GLUT_MIDDLE_BUTTON)
            this->mousemdown = GL_TRUE;
    }
    else
    {
        if(button == GLUT_RIGHT_BUTTON)
            this->mouserdown = GL_FALSE;
        if(button == GLUT_LEFT_BUTTON)
            this->mouseldown = GL_FALSE;
        if(button == GLUT_MIDDLE_BUTTON)
            this->mousemdown = GL_FALSE;
    }
    mouseX = x, mouseY = y;
}

/// call back func for mouse motions
void Mouse::mouseMotion(int x, int y)
{
    if(this->mouserdown == GL_TRUE)
    {
        this->xRotate += (x - this->mouseX) / 80.0f;
        this->yRotate -= (y - this->mouseY) / 120.0f;
    }

    if(this->mouseldown == GL_TRUE)
    {
        this->cenLength += (y - this->mouseY) / 25.0f;
    }
    this->mouseX = x, this->mouseY = y;
    this->calEyePosition();
    glutPostRedisplay();
}

void Mouse::mouseLookAt()
{
    this->calEyePosition();
    gluLookAt(this->eye[0], this->eye[1], this->eye[2],
              this->center[0], this->center[1], this->center[2],
              0, 1, 0);
}