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& position)
  37 {
  38         mState.position = position;
  39 }
  40
  41 void Camera::setRotation(const Quaternion& rotation)
  42 {
  43         mState.orientation = rotation;
  44 }
  45
  46 void Camera::lookAt(const Vector3& point)
  47 {
  48         // FIXME this doesn't work as expected
  49         cml::quaternion_rotation_aim_at(mState.orientation, mState.position, point,
  50                         Vector3(0.0, 1.0, 0.0));
  51 }
  52
  53
  54 void Camera::setProjection(const Matrix4& projection)
  55 {
  56         mProjection = projection;
  57 }
  58
  59 void Camera::setProjection(Scalar fovy, Scalar aspect, Scalar abutting,
  60                 Scalar distant)
  61 {
  62         cml::matrix_perspective_yfov_RH(mProjection, fovy, aspect, abutting,
  63                         distant, cml::z_clip_neg_one);
  64 }
  65
  66
  67 void Camera::uploadToGL(Scalar alpha) const
  68 {
  69         calculate(alpha);
  70
  71         glMatrixMode(GL_PROJECTION);
  72         glMultMatrix(mProjection.data());
  73
  74         glMatrixMode(GL_MODELVIEW);
  75         glMultMatrix(mModelview.data());
  76 }
  77
  78 void Camera::calculate(Scalar alpha) const
  79 {
  80         State3 state = getState(alpha);
  81
  82         cml::matrix_rotation_quaternion(mModelview, state.orientation);
  83
  84         Matrix4 translate;
  85         cml::matrix_translation(translate, state.position);
  86
  87         mModelview *= translate;
  88
  89         mFrustum.init(mModelview, mProjection);
  90 }
  91
  92
  93 void Camera::update(Scalar t, Scalar dt)
  94 {
  95         RigidBody3::update(t, dt);
  96 }
  97
  98 void Camera::draw(Scalar alpha) const
  99 {
 100         mSphere.draw(alpha);
 101 }
 102
 103
 104 void Camera::handleEvent(const Event& event)
 105 {
 106         const Scalar ds = 50.0;
 107
 108         switch (event.type)
 109         {
 110                 case SDL_KEYDOWN:
 111                         if (event.key.keysym.sym == SDLK_RIGHT)
 112                         {
 113                                 mState.position[0] -= ds;
 114                         }
 115                         else if (event.key.keysym.sym == SDLK_LEFT)
 116                         {
 117                                 mState.position[0] += ds;
 118                         }
 119                         else if (event.key.keysym.sym == SDLK_UP)
 120                         {
 121                                 mState.position[1] -= ds;
 122                         }
 123                         else if (event.key.keysym.sym == SDLK_DOWN)
 124                         {
 125                                 mState.position[1] += ds;
 126                         }
 127                         else if (event.key.keysym.sym == SDLK_PAGEUP)
 128                         {
 129                                 mState.position[2] += ds;
 130                         }
 131                         else if (event.key.keysym.sym == SDLK_PAGEDOWN)
 132                         {
 133                                 mState.position[2] -= ds;
 134                         }
 135                         break;
 136
 137                 case SDL_MOUSEMOTION:
 138                         {
 139                                 Scalar xrel = cml::rad(Scalar(event.motion.xrel) / 6.0);
 140                                 Scalar yrel = cml::rad(Scalar(event.motion.yrel) / 6.0);
 141
 142                                 Quaternion rotation = mState.orientation;
 143
 144                                 cml::quaternion_rotate_about_world_x(rotation, yrel);
 145                                 //mRotation.normalize();
 146                                 cml::quaternion_rotate_about_world_y(rotation, xrel);
 147
 148                                 rotation.normalize();
 149                                 mState.orientation = rotation;
 150                         }
 151                         break;
 152
 153                 case SDL_MOUSEBUTTONDOWN:
 154                         if (event.button.button == SDL_BUTTON_WHEELUP)
 155                         {
 156                                 mState.position[2] -= ds;
 157                         }
 158                         else if (event.button.button == SDL_BUTTON_WHEELDOWN)
 159                         {
 160                                 mState.position[2] -= ds;
 161                         }
 162                         break;
 163         }
 164 }
 165
 166
 167 } // namespace Mf
 168
 169 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 170