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Copy pathCamera.cpp
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/*
* Copyright 2010-2014 OpenXcom Developers.
*
* This file is part of OpenXcom.
*
* OpenXcom is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenXcom is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenXcom. If not, see <http://www.gnu.org/licenses/>.
*/
#define _USE_MATH_DEFINES
#include <cmath>
#include <fstream>
#include "Camera.h"
#include "Map.h"
#include "../Engine/Action.h"
#include "../Engine/Options.h"
#include "../Engine/Timer.h"
namespace OpenXcom
{
/**
* Sets up a camera.
* @param spriteWidth Width of map sprite.
* @param spriteHeight Height of map sprite.
* @param mapsize_x Current map size in X axis.
* @param mapsize_y Current map size in Y axis.
* @param mapsize_z Current map size in Z axis.
* @param map Pointer to map surface.
* @param visibleMapHeight Current height the view is at.
*/
Camera::Camera(int spriteWidth, int spriteHeight, int mapsize_x, int mapsize_y, int mapsize_z, Map *map, int visibleMapHeight) : _scrollMouseTimer(0), _scrollKeyTimer(0), _spriteWidth(spriteWidth), _spriteHeight(spriteHeight), _mapsize_x(mapsize_x), _mapsize_y(mapsize_y), _mapsize_z(mapsize_z), _screenWidth(map->getWidth()), _screenHeight(map->getHeight()),
_mapOffset(-250,250,0), _center(), _scrollMouseX(0), _scrollMouseY(0), _scrollKeyX(0), _scrollKeyY(0), _scrollTrigger(false), _visibleMapHeight(visibleMapHeight), _showAllLayers(false), _map(map)
{
}
/**
* Deletes the Camera.
*/
Camera::~Camera()
{
}
/**
* Sets the camera's scrolling timer.
* @param mouse Pointer to mouse timer.
* @param key Pointer to key timer.
*/
void Camera::setScrollTimer(Timer *mouse, Timer *key)
{
_scrollMouseTimer = mouse;
_scrollKeyTimer = key;
}
/**
* Sets the value to min if it is below min and to max if it is above max.
* @param value Pointer to the value.
* @param minValue The minimum value.
* @param maxValue The maximum value.
*/
void Camera::minMaxInt(int *value, const int minValue, const int maxValue) const
{
if (*value < minValue)
{
*value = minValue;
}
else if (*value > maxValue)
{
*value = maxValue;
}
}
/**
* Handles camera mouse shortcuts.
* @param action Pointer to an action.
* @param state State that the action handlers belong to.
*/
void Camera::mousePress(Action *action, State *)
{
if (Options::battleDragScrollButton != SDL_BUTTON_MIDDLE || (SDL_GetMouseState(0,0)&SDL_BUTTON(Options::battleDragScrollButton)) == 0)
{
if (action->getDetails()->button.button == SDL_BUTTON_WHEELUP)
{
up();
}
else if (action->getDetails()->button.button == SDL_BUTTON_WHEELDOWN)
{
down();
}
}
else if (action->getDetails()->button.button == SDL_BUTTON_LEFT && Options::battleEdgeScroll == SCROLL_TRIGGER)
{
_scrollTrigger = true;
mouseOver(action, 0);
}
}
/**
* Handles camera mouse shortcuts.
* @param action Pointer to an action.
* @param state State that the action handlers belong to.
*/
void Camera::mouseRelease(Action *action, State *)
{
if (action->getDetails()->button.button == SDL_BUTTON_LEFT && Options::battleEdgeScroll == SCROLL_TRIGGER)
{
_scrollMouseX = 0;
_scrollMouseY = 0;
_scrollMouseTimer->stop();
_scrollTrigger = false;
int posX = action->getXMouse();
int posY = action->getYMouse();
if ((posX < (SCROLL_BORDER * action->getXScale()) && posX > 0)
|| (posX > (_screenWidth - SCROLL_BORDER) * action->getXScale())
|| (posY < (SCROLL_BORDER * action->getYScale()) && posY > 0)
|| (posY > (_screenHeight - SCROLL_BORDER) * action->getYScale()))
// A cheap hack to avoid handling this event as a click
// on the map when the mouse is on the scroll-border
action->getDetails()->button.button = 0;
}
}
/**
* Handles mouse over events.
* @param action Pointer to an action.
* @param state State that the action handlers belong to.
*/
void Camera::mouseOver(Action *action, State *)
{
if (_map->getCursorType() == CT_NONE)
{
return;
}
if (Options::battleEdgeScroll == SCROLL_AUTO || _scrollTrigger)
{
int posX = action->getXMouse();
int posY = action->getYMouse();
int scrollSpeed = Options::battleScrollSpeed;
//left scroll
if (posX < (SCROLL_BORDER * action->getXScale()) && posX >= 0)
{
_scrollMouseX = scrollSpeed;
// if close to top or bottom, also scroll diagonally
//downleft
if (posY < (SCROLL_DIAGONAL_EDGE * action->getYScale()) && posY >= 0)
{
_scrollMouseY = scrollSpeed/2;
}
//upleft
else if (posY > (_screenHeight - SCROLL_DIAGONAL_EDGE) * action->getYScale())
{
_scrollMouseY = -scrollSpeed/2;
}
else _scrollMouseY = 0;
}
//right scroll
else if (posX > (_screenWidth - SCROLL_BORDER) * action->getXScale())
{
_scrollMouseX = -scrollSpeed;
// if close to top or bottom, also scroll diagonally
//downright
if (posY <= (SCROLL_DIAGONAL_EDGE * action->getYScale()) && posY >= 0)
{
_scrollMouseY = scrollSpeed/2;
}
//upright
else if (posY > (_screenHeight - SCROLL_DIAGONAL_EDGE) * action->getYScale())
{
_scrollMouseY = -scrollSpeed/2;
}
else _scrollMouseY = 0;
}
else if (posX)
{
_scrollMouseX = 0;
}
//up
if (posY < (SCROLL_BORDER * action->getYScale()) && posY >= 0)
{
_scrollMouseY = scrollSpeed;
// if close to left or right edge, also scroll diagonally
//up left
if (posX < (SCROLL_DIAGONAL_EDGE * action->getXScale()) && posX >= 0)
{
_scrollMouseX = scrollSpeed;
_scrollMouseY /=2;
}
//up right
else if (posX > (_screenWidth - SCROLL_DIAGONAL_EDGE) * action->getXScale())
{
_scrollMouseX = -scrollSpeed;
_scrollMouseY /=2;
}
}
//down
else if (posY > (_screenHeight- SCROLL_BORDER) * action->getYScale())
{
_scrollMouseY = -scrollSpeed;
// if close to left or right edge, also scroll diagonally
//down left
if (posX < (SCROLL_DIAGONAL_EDGE * action->getXScale()) && posX >= 0)
{
_scrollMouseX = scrollSpeed;
_scrollMouseY /=2;
}
//down right
else if (posX > (_screenWidth - SCROLL_DIAGONAL_EDGE) * action->getXScale())
{
_scrollMouseX = -scrollSpeed;
_scrollMouseY /=2;
}
}
else if (posY && _scrollMouseX == 0)
{
_scrollMouseY = 0;
}
if ((_scrollMouseX || _scrollMouseY) && !_scrollMouseTimer->isRunning() && !_scrollKeyTimer->isRunning() && 0==(SDL_GetMouseState(0,0)&SDL_BUTTON(Options::battleDragScrollButton)))
{
_scrollMouseTimer->start();
}
else if ((!_scrollMouseX && !_scrollMouseY) && _scrollMouseTimer->isRunning())
{
_scrollMouseTimer->stop();
}
}
}
/**
* Handles camera keyboard shortcuts.
* @param action Pointer to an action.
* @param state State that the action handlers belong to.
*/
void Camera::keyboardPress(Action *action, State *)
{
if (_map->getCursorType() == CT_NONE)
{
return;
}
int key = action->getDetails()->key.keysym.sym;
int scrollSpeed = Options::battleScrollSpeed;
if (key == Options::keyBattleLeft)
{
_scrollKeyX = scrollSpeed;
}
else if (key == Options::keyBattleRight)
{
_scrollKeyX = -scrollSpeed;
}
else if (key == Options::keyBattleUp)
{
_scrollKeyY = scrollSpeed;
}
else if (key == Options::keyBattleDown)
{
_scrollKeyY = -scrollSpeed;
}
if ((_scrollKeyX || _scrollKeyY) && !_scrollKeyTimer->isRunning() && !_scrollMouseTimer->isRunning() && 0==(SDL_GetMouseState(0,0)&SDL_BUTTON(Options::battleDragScrollButton)))
{
_scrollKeyTimer->start();
}
else if ((!_scrollKeyX && !_scrollKeyY) && _scrollKeyTimer->isRunning())
{
_scrollKeyTimer->stop();
}
}
/**
* Handles camera keyboard shortcuts.
* @param action Pointer to an action.
* @param state State that the action handlers belong to.
*/
void Camera::keyboardRelease(Action *action, State *)
{
if (_map->getCursorType() == CT_NONE)
{
return;
}
int key = action->getDetails()->key.keysym.sym;
if (key == Options::keyBattleLeft)
{
_scrollKeyX = 0;
}
else if (key == Options::keyBattleRight)
{
_scrollKeyX = 0;
}
else if (key == Options::keyBattleUp)
{
_scrollKeyY = 0;
}
else if (key == Options::keyBattleDown)
{
_scrollKeyY = 0;
}
if ((_scrollKeyX || _scrollKeyY) && !_scrollKeyTimer->isRunning() && !_scrollMouseTimer->isRunning() && 0==(SDL_GetMouseState(0,0)&SDL_BUTTON(Options::battleDragScrollButton)))
{
_scrollKeyTimer->start();
}
else if ((!_scrollKeyX && !_scrollKeyY) && _scrollKeyTimer->isRunning())
{
_scrollKeyTimer->stop();
}
}
/**
* Handles mouse-scrolling.
*/
void Camera::scrollMouse()
{
scrollXY(_scrollMouseX, _scrollMouseY, true);
}
/**
* Handles keyboard-scrolling.
*/
void Camera::scrollKey()
{
scrollXY(_scrollKeyX, _scrollKeyY, true);
}
/**
* Handles scrolling with given deviation.
* @param x X deviation.
* @param y Y deviation.
* @param redraw Redraw map or not.
*/
void Camera::scrollXY(int x, int y, bool redraw)
{
_mapOffset.x += x;
_mapOffset.y += y;
do
{
convertScreenToMap((_screenWidth / 2), (_visibleMapHeight / 2), &_center.x, &_center.y);
// Handling map bounds...
// Ok, this is a prototype, it should be optimized.
// Actually this should be calculated instead of slow-approximation.
if (_center.x < 0) { _mapOffset.x -= 1; _mapOffset.y -= 1; continue; }
if (_center.x > _mapsize_x -1) { _mapOffset.x += 1; _mapOffset.y += 1; continue; }
if (_center.y < 0) { _mapOffset.x += 1; _mapOffset.y -= 1; continue; }
if (_center.y > _mapsize_y -1) { _mapOffset.x -= 1; _mapOffset.y += 1; continue; }
break;
}
while (true);
_map->refreshSelectorPosition();
if (redraw) _map->invalidate();
}
/**
* Handles jumping with given deviation.
* @param x X deviation.
* @param y Y deviation.
*/
void Camera::jumpXY(int x, int y)
{
_mapOffset.x += x;
_mapOffset.y += y;
convertScreenToMap((_screenWidth / 2), (_visibleMapHeight / 2), &_center.x, &_center.y);
}
/**
* Goes one level up.
*/
void Camera::up()
{
if (_mapOffset.z < _mapsize_z - 1)
{
_mapOffset.z++;
_mapOffset.y += _spriteHeight * 3 / 5;
_map->draw();
}
}
/**
* Goes one level down.
*/
void Camera::down()
{
if (_mapOffset.z > 0)
{
_mapOffset.z--;
_mapOffset.y -= _spriteHeight * 3 / 5;
_map->draw();
}
}
/**
* Sets the view level.
* @param viewlevel New view level.
*/
void Camera::setViewLevel(int viewlevel)
{
_mapOffset.z = viewlevel;
minMaxInt(&_mapOffset.z, 0, _mapsize_z-1);
_map->draw();
}
/**
* Centers map on a certain position.
* @param mapPos Position to center on.
* @param redraw Redraw map or not.
*/
void Camera::centerOnPosition(const Position &mapPos, bool redraw)
{
Position screenPos;
_center = mapPos;
minMaxInt(&_center.x, -1, _mapsize_x);
minMaxInt(&_center.y, -1, _mapsize_y);
convertMapToScreen(_center, &screenPos);
_mapOffset.x = -(screenPos.x - (_screenWidth / 2));
_mapOffset.y = -(screenPos.y - (_visibleMapHeight / 2));
_mapOffset.z = _center.z;
if (redraw) _map->draw();
}
/**
* Gets map's center position.
* @return Map's center position.
*/
Position Camera::getCenterPosition()
{
_center.z = _mapOffset.z;
return _center;
}
/**
* Converts screen coordinates to map coordinates.
* @param screenX Screen x position.
* @param screenY Screen y position.
* @param mapX Map x position.
* @param mapY Map y position.
*/
void Camera::convertScreenToMap(int screenX, int screenY, int *mapX, int *mapY) const
{
// add half a tileheight to the mouseposition per layer we are above the floor
screenY += (-_spriteWidth/2) + (_mapOffset.z) * ((_spriteHeight + _spriteWidth / 4) / 2);
// calculate the actual x/y pixelposition on a diamond shaped map
// taking the view offset into account
*mapY = - screenX + _mapOffset.x + 2 * screenY - 2 * _mapOffset.y;
*mapX = screenY - _mapOffset.y - *mapY / 4 - (_spriteWidth/4);
// to get the row&col itself, divide by the size of a tile
*mapX /= (_spriteWidth / 4);
*mapY /= _spriteWidth;
minMaxInt(mapX, -1, _mapsize_x);
minMaxInt(mapY, -1, _mapsize_y);
}
/**
* Converts map coordinates X,Y,Z to screen positions X, Y.
* @param mapPos X,Y,Z coordinates on the map.
* @param screenPos Screen position.
*/
void Camera::convertMapToScreen(const Position &mapPos, Position *screenPos) const
{
screenPos->z = 0; // not used
screenPos->x = mapPos.x * (_spriteWidth / 2) - mapPos.y * (_spriteWidth / 2);
screenPos->y = mapPos.x * (_spriteWidth / 4) + mapPos.y * (_spriteWidth / 4) - mapPos.z * ((_spriteHeight + _spriteWidth / 4) / 2);
}
/**
* Converts voxel coordinates X,Y,Z to screen positions X, Y.
* @param voxelPos X,Y,Z coordinates of the voxel.
* @param screenPos Screen position.
*/
void Camera::convertVoxelToScreen(const Position &voxelPos, Position *screenPos) const
{
Position mapPosition = Position(voxelPos.x / 16, voxelPos.y / 16, voxelPos.z / 24);
convertMapToScreen(mapPosition, screenPos);
double dx = voxelPos.x - (mapPosition.x * 16);
double dy = voxelPos.y - (mapPosition.y * 16);
double dz = voxelPos.z - (mapPosition.z * 24);
screenPos->x += (int)(dx - dy) + (_spriteWidth/2);
screenPos->y += (int)(((_spriteHeight / 2.0)) + (dx / 2.0) + (dy / 2.0) - dz);
screenPos->x += _mapOffset.x;
screenPos->y += _mapOffset.y;
}
/**
* Gets the displayed level.
* @return The displayed layer.
*/
int Camera::getViewLevel() const
{
return _mapOffset.z;
}
/**
* Gets the map size x.
* @return The map size x.
*/
int Camera::getMapSizeX() const
{
return _mapsize_x;
}
/**
* Gets the map size y.
* @return The map size y.
*/
int Camera::getMapSizeY() const
{
return _mapsize_y;
}
/**
* Gets the map offset.
* @return The map offset.
*/
Position Camera::getMapOffset()
{
return _mapOffset;
}
/**
* Sets the map offset.
* @param pos The map offset.
*/
void Camera::setMapOffset(Position pos)
{
_mapOffset = pos;
}
/**
* Toggles showing all map layers.
* @return New layer setting.
*/
int Camera::toggleShowAllLayers()
{
_showAllLayers = !_showAllLayers;
return _showAllLayers?2:1;
}
/**
* Checks if the camera is showing all map layers.
* @return Current layer setting.
*/
bool Camera::getShowAllLayers() const
{
return _showAllLayers;
}
/**
* Checks if map coordinates X,Y,Z are on screen.
* @param mapPos Coordinates to check.
* @param unitWalking True to offset coordinates for a unit walking.
* @return True if the map coordinates are on screen.
*/
bool Camera::isOnScreen(const Position &mapPos, const bool unitWalking) const
{
Position screenPos;
convertMapToScreen(mapPos, &screenPos);
screenPos.x += _mapOffset.x;
screenPos.y += _mapOffset.y;
if (unitWalking)
{
return screenPos.x >= -48
&& screenPos.x <= _screenWidth + 24
&& screenPos.y >= -56
&& screenPos.y <= _screenHeight + 12;
}
else
{
return screenPos.x >= 0
&& screenPos.x <= _screenWidth - 10
&& screenPos.y >= 0
&& screenPos.y <= _screenHeight - 10;
}
}
/**
* Resizes the viewable window of the camera.
*/
void Camera::resize()
{
_screenWidth = _map->getWidth();
_screenHeight = _map->getHeight();
_visibleMapHeight = _map->getHeight() - Map::ICON_HEIGHT;
}
void Camera::stopMouseScrolling()
{
_scrollMouseTimer->stop();
}
}