Dogcows Code - chaz/yoink/blob - src/Character.hh

   1
   2 /*******************************************************************************
   3
   4  Copyright (c) 2009, Charles McGarvey
   5  All rights reserved.
   6
   7  Redistribution   and   use  in  source  and  binary  forms,  with  or  without
   8  modification, are permitted provided that the following conditions are met:
   9
  10    * Redistributions  of  source  code  must retain the above copyright notice,
  11      this list of conditions and the following disclaimer.
  12    * Redistributions  in binary form must reproduce the above copyright notice,
  13      this  list of conditions and the following disclaimer in the documentation
  14      and/or other materials provided with the distribution.
  15
  16  THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  20  FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23  CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 *******************************************************************************/
  28
  29 #ifndef _CHARACTER_HH_
  30 #define _CHARACTER_HH_
  31
  32 #include <boost/shared_ptr.hpp>
  33
  34 #include <Moof/Animation.hh>
  35 #include <Moof/Entity.hh>
  36 #include <Moof/Event.hh>
  37 #include <Moof/Math.hh>
  38 #include <Moof/RK4.hh>
  39 #include <Moof/Tilemap.hh>
  40
  41
  42 struct Character;
  43 typedef boost::shared_ptr<Character> CharacterP;
  44
  45
  46 /**
  47  * Parent class of animate objects with "personalities."  This basically
  48  * includes the heroine herself and the bad guys.
  49  */
  50
  51 struct Character : public Mf::Entity
  52 {
  53         /*
  54         struct Derivative
  55         {
  56                 Mf::Vector2 velocity;
  57                 Mf::Vector2 force;
  58
  59                 Derivative operator*(Mf::Scalar dt) const
  60                 {
  61                         Derivative derivative;
  62                         derivative.velocity = dt * velocity;
  63                         derivative.force = dt * force;
  64                         return derivative;
  65                 }
  66
  67                 Derivative operator+(const Derivative& other) const
  68                 {
  69                         Derivative derivative;
  70                         derivative.velocity = velocity + other.velocity;
  71                         derivative.force = force + other.force;
  72                         return derivative;
  73                 }
  74         };
  75
  76         struct State
  77         {
  78                 // primary
  79
  80                 Mf::Vector2 position;
  81                 Mf::Vector2 momentum;
  82                 Mf::Vector2 force;
  83
  84                 // secondary
  85
  86                 Mf::Vector2 velocity;
  87
  88                 // constant
  89
  90                 Mf::Scalar      mass;
  91                 Mf::Scalar      inverseMass;
  92
  93                 void recalculate()
  94                 {
  95                         velocity = momentum * inverseMass;
  96                 }
  97
  98
  99                 void getDerivative(Derivative& derivative, Mf::Scalar t) const
 100                 {
 101                         //derivative.velocity = Mf::Vector2(0.0, 0.0);
 102                         //derivative.force = Mf::Vector2(0.0, 0.0);
 103                         derivative.velocity = velocity;
 104                         derivative.force = force;
 105
 106                         //Mf::Vector2 x = position - Mf::Vector2(500.0, 200.0);
 107                         //derivative.force += -15.0 * x - 1.5 * velocity;
 108                 }
 109
 110                 void applyDerivative(const Derivative& derivative, Mf::Scalar dt)
 111                 {
 112                         position += dt * derivative.velocity;
 113                         momentum += dt * derivative.force;
 114                         recalculate();
 115                 }
 116
 117                 // these two operator overloads all using the state in generic
 118                 // interpolator implementations
 119
 120                 State operator*(Mf::Scalar scalar) const
 121                 {
 122                         State state = *this;
 123                         state.position *= scalar;
 124                         state.momentum *= scalar;
 125                         state.recalculate();
 126                         return state;
 127                 }
 128
 129                 State operator+(const State& state) const
 130                 {
 131                         State newState = *this;
 132                         newState.position +=  state.position;
 133                         newState.momentum +=  state.momentum;
 134                         newState.recalculate();
 135                         return newState;
 136                 }
 137         };
 138 */
 139
 140         Mf::State2              previous;
 141         Mf::State2              current;
 142
 143
 144 private:
 145
 146         static const Mf::Scalar z = 96.0;
 147
 148         Mf::Tilemap             tilemap_;
 149         Mf::Animation   animation_;
 150
 151 protected:
 152
 153         Mf::Vector2 userForce;
 154
 155 public:
 156
 157         Character(const std::string& name);
 158         virtual ~Character() {}
 159
 160         virtual void update(Mf::Scalar t, Mf::Scalar dt);
 161         virtual void draw(Mf::Scalar alpha) const;
 162
 163         Mf::Tilemap& getTilemap();
 164         Mf::Animation& getAnimation();
 165 };
 166
 167
 168 #endif // _CHARACTER_HH_
 169
 170 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 171