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118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
/*
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* BattleSiegeController.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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#include "../../lib/CCreatureHandler.h"
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#include "../../lib/Point.h"
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VCMI_LIB_NAMESPACE_BEGIN
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class CStack;
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class CSpell;
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VCMI_LIB_NAMESPACE_END
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class CAnimation;
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class Canvas;
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class BattleInterface;
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/// Base class for projectiles
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struct ProjectileBase
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{
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virtual ~ProjectileBase() = default;
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virtual void show(Canvas & canvas) = 0;
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Point from; // initial position on the screen
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Point dest; // target position on the screen
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float progress; // current position of projectile on from->dest line
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float speed; // how much progress is gained per second
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int shooterID; // ID of shooter stack
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bool playing; // if set to true, projectile animation is playing, e.g. flying to target
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};
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/// Projectile for most shooters - render pre-selected frame moving in straight line from origin to destination
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struct ProjectileMissile : ProjectileBase
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{
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void show(Canvas & canvas) override;
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std::shared_ptr<CAnimation> animation;
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int frameNum; // frame to display from projectile animation
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bool reverse; // if true, projectile will be flipped by vertical axis
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};
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/// Projectile for spell - render animation moving in straight line from origin to destination
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struct ProjectileAnimatedMissile : ProjectileMissile
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{
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void show(Canvas & canvas) override;
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float frameProgress;
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};
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/// Projectile for catapult - render spinning projectile moving at parabolic trajectory to its destination
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struct ProjectileCatapult : ProjectileBase
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{
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void show(Canvas & canvas) override;
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std::shared_ptr<CAnimation> animation;
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float frameProgress;
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};
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/// Projectile for mages/evil eye - render ray expanding from origin position to destination
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struct ProjectileRay : ProjectileBase
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{
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void show(Canvas & canvas) override;
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std::vector<CCreature::CreatureAnimation::RayColor> rayConfig;
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};
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/// Class that manages all ongoing projectiles in the game
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/// ... even though in H3 only 1 projectile can be on screen at any point of time
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class BattleProjectileController
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{
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BattleInterface & owner;
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/// all projectiles loaded during current battle
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std::map<std::string, std::shared_ptr<CAnimation>> projectilesCache;
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/// projectiles currently flying on battlefield
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std::vector<std::shared_ptr<ProjectileBase>> projectiles;
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std::shared_ptr<CAnimation> getProjectileImage(const CStack * stack);
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std::shared_ptr<CAnimation> createProjectileImage(const std::string & path );
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void initStackProjectile(const CStack * stack);
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bool stackUsesRayProjectile(const CStack * stack) const;
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bool stackUsesMissileProjectile(const CStack * stack) const;
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void showProjectile(Canvas & canvas, std::shared_ptr<ProjectileBase> projectile);
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const CCreature & getShooter(const CStack * stack) const;
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int computeProjectileFrameID( Point from, Point dest, const CStack * stack);
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float computeProjectileFlightTime( Point from, Point dest, double speed);
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public:
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BattleProjectileController(BattleInterface & owner);
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/// renders all currently active projectiles
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void showProjectiles(Canvas & canvas);
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/// returns true if stack has projectile that is yet to hit target
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bool hasActiveProjectile(const CStack * stack, bool emittedOnly) const;
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/// starts rendering previously created projectile
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void emitStackProjectile(const CStack * stack);
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/// creates (but not emits!) projectile and initializes it based on parameters
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void createProjectile(const CStack * shooter, Point from, Point dest);
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void createSpellProjectile(const CStack * shooter, Point from, Point dest, const CSpell * spell);
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void createCatapultProjectile(const CStack * shooter, Point from, Point dest);
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};
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