Dogcows Code - chaz/yoink/blob - src/Moof/Camera.cc

   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 #include "Camera.hh"
  30 #include "OpenGL.hh"
  31
  32
  33 namespace Mf {
  34
  35
  36 void Camera::setPosition(const Vector3& point)
  37 {
  38         position_ = point;
  39         calculateSecondary();
  40         //Vector3 coeff[2] = {position_, point};
  41         //pInterp_.init(coeff, 0.1);
  42 }
  43 void Camera::setRotation(const Quaternion& rotation)
  44 {
  45         rotation_ = rotation;
  46 }
  47
  48
  49 void Camera::setProjection(const Matrix4& projection)
  50 {
  51         projection_ = projection;
  52 }
  53
  54 void Camera::setProjection(Scalar fovy, Scalar aspect, Scalar abutting,
  55                 Scalar distant)
  56 {
  57         cml::matrix_perspective_yfov_RH(projection_, fovy, aspect, abutting,
  58                         distant, cml::z_clip_neg_one);
  59         calculateSecondary();
  60 }
  61
  62
  63 void Camera::uploadToGL() const
  64 {
  65         glMatrixMode(GL_PROJECTION);
  66         glMultMatrix(projection_.data());
  67
  68         glMatrixMode(GL_MODELVIEW);
  69         glMultMatrix(modelview_.data());
  70 }
  71
  72 void Camera::update(Scalar t, Scalar dt)
  73 {
  74         //pInterp_.update(dt);
  75         //position_ = pInterp_.getState(0.0);
  76
  77         //calculateSecondary();
  78 }
  79
  80
  81 void Camera::lookAt(const Vector3& point)
  82 {
  83         cml::quaternion_rotation_aim_at(rotation_, position_, point,
  84                         Vector3(0.0, -1.0, 0.0));
  85         calculateSecondary();
  86 }
  87
  88 void Camera::handleEvent(const Event& event)
  89 {
  90         switch (event.type)
  91         {
  92                 case SDL_KEYDOWN:
  93                         if (event.key.keysym.sym == SDLK_RIGHT)
  94                         {
  95                                 Vector3 vec = position_;
  96                                 vec[0] -= 50.0;
  97                                 setPosition(vec);
  98                         }
  99                         else if (event.key.keysym.sym == SDLK_LEFT)
 100                         {
 101                                 Vector3 vec = position_;
 102                                 vec[0] += 50.0;
 103                                 setPosition(vec);
 104                         }
 105                         else if (event.key.keysym.sym == SDLK_UP)
 106                         {
 107                                 Vector3 vec = position_;
 108                                 vec[1] -= 50.0;
 109                                 setPosition(vec);
 110                         }
 111                         else if (event.key.keysym.sym == SDLK_DOWN)
 112                         {
 113                                 Vector3 vec = position_;
 114                                 vec[1] += 50.0;
 115                                 setPosition(vec);
 116                         }
 117                         else if (event.key.keysym.sym == SDLK_PAGEUP)
 118                         {
 119                                 Vector3 vec = position_;
 120                                 vec[2] += 50.0;
 121                                 setPosition(vec);
 122                         }
 123                         else if (event.key.keysym.sym == SDLK_PAGEDOWN)
 124                         {
 125                                 Vector3 vec = position_;
 126                                 vec[2] -= 50.0;
 127                                 setPosition(vec);
 128                         }
 129                         break;
 130
 131                 case SDL_MOUSEMOTION:
 132                         {
 133                         Scalar xrel = cml::rad(Scalar(event.motion.xrel) / 5.0);
 134                         Scalar yrel = cml::rad(Scalar(event.motion.yrel) / 5.0);
 135
 136                         Quaternion rotation = rotation_;
 137
 138                         cml::quaternion_rotate_about_world_x(rotation, yrel);
 139                         //rotation_.normalize();
 140                         cml::quaternion_rotate_about_world_y(rotation, xrel);
 141                         rotation.normalize();
 142
 143                         setRotation(rotation);
 144                         break;
 145                         }
 146
 147                 case SDL_MOUSEBUTTONDOWN:
 148                         if (event.button.button == SDL_BUTTON_WHEELUP)
 149                         {
 150                                 Vector3 vec = position_;
 151                                 vec[2] += 50.0;
 152                                 setPosition(vec);
 153                         }
 154                         else if (event.button.button == SDL_BUTTON_WHEELDOWN)
 155                         {
 156                                 Vector3 vec = position_;
 157                                 vec[2] -= 50.0;
 158                                 setPosition(vec);
 159                         }
 160                         break;
 161         }
 162
 163         calculateSecondary();
 164 }
 165
 166 void Camera::calculateSecondary()
 167 {
 168         cml::matrix_rotation_quaternion(modelview_, rotation_);
 169
 170         Matrix4 translate;
 171         cml::matrix_translation(translate, position_);
 172
 173         //modelview_.transpose();
 174         modelview_ *= translate;
 175         //modelview_ = translate * modelview_;
 176
 177         frustum_.init(modelview_, projection_);
 178 }
 179
 180
 181 } // namespace Mf
 182
 183 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 184