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/Entity.hh>
  35 #include <Moof/Event.hh>
  36 #include <Moof/Math.hh>
  37 #include <Moof/RK4.hh>
  38
  39 #include "Animation.hh"
  40 #include "Tilemap.hh"
  41
  42
  43
  44 struct Character;
  45 typedef boost::shared_ptr<Character> CharacterP;
  46
  47
  48 /**
  49  * Parent class of animate objects with "personalities."  This basically
  50  * includes the heroine herself and the bad guys.
  51  */
  52
  53 struct Character : public Mf::Entity
  54 {
  55         /*
  56         struct Derivative
  57         {
  58                 Mf::Vector2 velocity;
  59                 Mf::Vector2 force;
  60
  61                 Derivative operator*(Mf::Scalar dt) const
  62                 {
  63                         Derivative derivative;
  64                         derivative.velocity = dt * velocity;
  65                         derivative.force = dt * force;
  66                         return derivative;
  67                 }
  68
  69                 Derivative operator+(const Derivative& other) const
  70                 {
  71                         Derivative derivative;
  72                         derivative.velocity = velocity + other.velocity;
  73                         derivative.force = force + other.force;
  74                         return derivative;
  75                 }
  76         };
  77
  78         struct State
  79         {
  80                 // primary
  81
  82                 Mf::Vector2 position;
  83                 Mf::Vector2 momentum;
  84                 Mf::Vector2 force;
  85
  86                 // secondary
  87
  88                 Mf::Vector2 velocity;
  89
  90                 // constant
  91
  92                 Mf::Scalar      mass;
  93                 Mf::Scalar      inverseMass;
  94
  95                 void recalculate()
  96                 {
  97                         velocity = momentum * inverseMass;
  98                 }
  99
 100
 101                 void getDerivative(Derivative& derivative, Mf::Scalar t) const
 102                 {
 103                         //derivative.velocity = Mf::Vector2(0.0, 0.0);
 104                         //derivative.force = Mf::Vector2(0.0, 0.0);
 105                         derivative.velocity = velocity;
 106                         derivative.force = force;
 107
 108                         //Mf::Vector2 x = position - Mf::Vector2(500.0, 200.0);
 109                         //derivative.force += -15.0 * x - 1.5 * velocity;
 110                 }
 111
 112                 void applyDerivative(const Derivative& derivative, Mf::Scalar dt)
 113                 {
 114                         position += dt * derivative.velocity;
 115                         momentum += dt * derivative.force;
 116                         recalculate();
 117                 }
 118
 119                 // these two operator overloads all using the state in generic
 120                 // interpolator implementations
 121
 122                 State operator*(Mf::Scalar scalar) const
 123                 {
 124                         State state = *this;
 125                         state.position *= scalar;
 126                         state.momentum *= scalar;
 127                         state.recalculate();
 128                         return state;
 129                 }
 130
 131                 State operator+(const State& state) const
 132                 {
 133                         State newState = *this;
 134                         newState.position +=  state.position;
 135                         newState.momentum +=  state.momentum;
 136                         newState.recalculate();
 137                         return newState;
 138                 }
 139         };
 140 */
 141
 142         Mf::State2              previous;
 143         Mf::State2              current;
 144
 145
 146 private:
 147
 148         static const Mf::Scalar z = 96.0;
 149
 150 protected:
 151
 152         Mf::Vector2 userForce;
 153
 154 public:
 155
 156         Character(const std::string& name);
 157         virtual ~Character() {}
 158
 159         virtual void update(Mf::Scalar t, Mf::Scalar dt);
 160         virtual void draw(Mf::Scalar alpha) const;
 161
 162
 163         Tilemap         tilemap;
 164         Animation       animation;
 165 };
 166
 167
 168 #endif // _CHARACTER_HH_
 169
 170 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 171