//  cameraMap.cpp
//
//  Implementation file for CameraMap Class
//  Defines all the methods declared, but not defined, in cameraMap.h
//
//  Shay Leary, April 2005
//--------------------------------------------------------------------------------------

#include "cameraMap.h"

//--------------------------------------------------------------------------------------
//  Display a map with a cursor on it, which moves with the camera
//--------------------------------------------------------------------------------------

void CameraMap::DisplayMap(const int& screenWidth,
                           const int& screenHeight,
                           const GLdouble& xPos,
                           const GLdouble& zPos,
                           const GLuint& tempImage) {
    GLdouble tempX = xPos / 163.0 - 2096 / 163;
    GLdouble tempZ = zPos / 164.0 - 4688 / 164;
    glPushMatrix();
    glMatrixMode(GL_PROJECTION);
    glPushMatrix();
    glLoadIdentity();
    glOrtho(0, screenWidth, 0, screenHeight, -1, 1);
    glScalef(1, -1, 1);

    // mover the origin from the bottom left corner
    // to the upper left corner
    glTranslated(0, (int)-screenHeight, 0);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    // display the cursor of the camera position
    glBegin(GL_QUADS);
    glVertex3d(219.0 - tempX - 2.0, 256.0 - tempZ - 2.0, 0.0);
    glVertex3d(219.0 - tempX + 2.0, 256.0 - tempZ - 2.0, 0.0);
    glVertex3d(219.0 - tempX + 2.0, 256.0 - tempZ + 2.0, 0.0);
    glVertex3d(219.0 - tempX - 2.0, 256.0 - tempZ + 2.0, 0.0);
    glEnd();

    // display map
    glBindTexture(GL_TEXTURE_2D, tempImage);
    glCallList(448);

    // Reset Perspective Projection
    glMatrixMode(GL_PROJECTION);
    glPopMatrix();
    glMatrixMode(GL_MODELVIEW);
    glPopMatrix();
}

//--------------------------------------------------------------------------------------
//  Displays a welcome or exit screen
//--------------------------------------------------------------------------------------
void CameraMap::DisplayWelcomeScreen(const int& screenWidth,
                                     const int& screenHeight,
                                     const int& tempExit,
                                     const GLuint& tempImage) {
    glPushMatrix();
    glMatrixMode(GL_PROJECTION);
    glPushMatrix();
    glLoadIdentity();
    glOrtho(0, screenWidth, 0, screenHeight, -1, 1);
    glScalef(1, -1, 1);

    // move to centre of screen
    glTranslated(screenWidth / 2 - 256.0, -screenHeight / 2 - 256.0, 0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    // display exit screen or welcome screen
    if (tempExit == 1) {
        glBindTexture(GL_TEXTURE_2D, tempImage);
        // display image
        glCallList(449);
    } else {
        glBindTexture(GL_TEXTURE_2D, tempImage);
        // display image
        glCallList(455);
    }
    // Reset Perspective Projection
    glMatrixMode(GL_PROJECTION);
    glPopMatrix();
    glMatrixMode(GL_MODELVIEW);
    glPopMatrix();
}

void CameraMap::DisplayNoExit(const int& screenWidth,
                              const int& screenHeight,
                              const GLuint& tempImage) {
    glPushMatrix();
    glMatrixMode(GL_PROJECTION);
    glPushMatrix();
    glLoadIdentity();
    glOrtho(0, screenWidth, 0, screenHeight, -1, 1);
    glScalef(1, -1, 1);

    // move to centre of screen
    glTranslated(screenWidth / 2 - 128.0, -screenHeight / 2 - 32.0, 0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    // display sign
    glBindTexture(GL_TEXTURE_2D, tempImage);
    // display image
    glCallList(454);
    // Reset Perspective Projection
    glMatrixMode(GL_PROJECTION);
    glPopMatrix();
    glMatrixMode(GL_MODELVIEW);
    glPopMatrix();
}