Camera::Camera()
: _far(CLIPPING_DEPTH_MAX),
_near(CLIPPING_DEPTH_MIN),
_fov(90),
_focalPoint(0)
{
setPerspectiveMatrix(_near,_far,_fov);
}
void setupCamera(ShaderProgram * sp, const Camera * camera)
{
/* Pointers */
GLint viewProjP, viewPosP;
/* Matrices */
mat4 viewTrMatrix, viewRotMatrix, viewMatrix;
mat4 projMatrix, viewProjMatrix;
setPerspectiveMatrix(projMatrix,
camera->viewAngleY,
camera->aspect,
camera->znear,
camera->zfar);
setMatrixFromQuaternion(viewRotMatrix, camera->q);
setTranslationMatrix(viewTrMatrix,
-camera->pos[0],
-camera->pos[1],
-camera->pos[2]);
setMulMatrix(viewMatrix, viewRotMatrix, viewTrMatrix);
setMulMatrix(viewProjMatrix, projMatrix, viewMatrix);
glUseProgram(sp->p);
viewProjP = glGetUniformLocation(sp->p, "transform.viewProjection");
/* TODO: if (viewProjP == -1) {} */
glUniformMatrix4fv(viewProjP, 1, GL_TRUE, viewProjMatrix);
viewPosP = glGetUniformLocation(sp->p, "transform.viewPosition");
/* TODO: if (viewPosP == -1) {} */
glUniform3fv(viewPosP, 1, camera->pos);
#ifdef DEBUG
validateShaderProgram(sp->p);
#endif
CHECK_OPENGL_ERRORS(__FILE__, __LINE__);
}
static void render()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear the draw buffer
glEnable( GL_BLEND );
currentCamera->setAspectRatio(resolution.x/resolution.y);
setCameraTransMatrix(currentCamera->getCameraTransformationMatrix());
setPerspectiveMatrix(currentCamera->getPerspectiveMatrix());
setCameraPosition(currentCamera->getTranslate());
setLights(wLights,LIGHT_COUNT);
setAmbientLightColor(vec3(.1,.05,.075));
setAmbientLightColor(vec3(.1,.1,.2));
//
//Draw non-transparent models, pushing transparent ones onto a max-heap
TransparencyQueue transparencyQueue;
drawOpaqueEntities(wEntities, transparencyQueue); //Draw Every GameEntity
drawOpaqueEntities(wWalls, transparencyQueue); //Draw Every Wall
drawOpaqueEntities(wSoftEntities, transparencyQueue);
//Draw transparent models, furthest from camera first
//Disable updating the z-buffer, but still conduct the
//test so that nearer opaque objects completely occlude
//farther transparent objects.
glEnable( GL_BLEND );
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(GL_FALSE);
while(!transparencyQueue.empty()) {
transparencyQueue.top()->draw();
transparencyQueue.pop();
}
glDepthMask(GL_TRUE);
glDisable(GL_BLEND);
}
/**
* @brief Changes the fovy and computes new perspective projection matrix.
* @param new_fovy New value for field of view.
*/
void changeFovy (float new_fovy)
{
fovy = new_fovy;
setPerspectiveMatrix(fovy, aspect_ratio, near_plane, far_plane);
}
void callbackDisplay() {
//Render all the TVCameras.
CameraEntity* const originalCamera = currentCamera;
for(TVCameraList::iterator i = wTVCameras.begin(); i != wTVCameras.end(); ++i) {
currentCamera = &(*i)->cameraEntity;
(*i)->framebuffer.render(&render, 160, 160);
}
currentCamera = originalCamera;
//Render to the screen.
render();
//UI hack
glEnable(GL_BLEND);
setAmbientLightColor(vec3(1,1,1));
setCameraTransMatrix(mat4());
setPerspectiveMatrix(currentCamera->getOrthographicMatrix());
setCameraPosition(vec3(0,0,.5));
Wall w=Wall();
w.translate(-(.4)*(resolution.x/resolution.y),.48,-10);
w.scale((Globals::getPlayer()->getHealth()/Player::MAX_HEALTH)*.5,.025,.1);
DrawableEntity d=DrawableEntity(NULL,"Resources/cube.obj");
d.translate(.5,0,0);
d.setAlpha(.75);
w.setModel(d);
w.draw();
w.translate(0,-.02,0);
w.setScale((Globals::getPlayer()->getShieldCharge()/Player::MAX_SHIELD)*.5,.01,.1);
w.draw();
glDisable(GL_BLEND);
//Draw UI Text
if(useText) {
Globals::setModelTransMatrix(mat4());
Text2D n;
n.draw_stuff("HEALTH",vec4(1,1,1,1), -0.495*(resolution.x/resolution.y), .4725 );
n.draw_stuff("SHIELD",vec4(1,1,1,1), -0.495*(resolution.x/resolution.y), .449 );
char* weaponText="";
switch(getPlayer()->getWeapon()){
case 2:
weaponText="CURVY BULLET";
break;
case 0:
weaponText="MACHINE GUN";
break;
case 1:
weaponText="MORTAR";
break;
}
n.draw_stuff(weaponText,vec4(1,1,1,1), -0.495*(resolution.x/resolution.y), .449-(.4725-.449) );
if(wScenes[currentLevel]->_beaten){
n.draw_stuff("You Won!!",vec4(1,1,1,1),-.025,.05);
n.draw_stuff("Press 'esc' to quit",vec4(1,1,1,1),-.1,0);
}
}
glutSwapBuffers();
}
