void display()
{
// This function is called whenever it is time to render
// a new frame; due to the idle()-function below, this
// function will get called several times per second
// Clear framebuffer & zbuffer
glClearColor(0.3, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Set current material
glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuseColor);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specularColor);
// Place camera and light
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(100,50,50, 0, 0, 0, 0, 1, 0); // No manual control but better place from the start
glLoadMatrixd(getCameraMatrix());
glLightfv(GL_LIGHT0, GL_POSITION, light_position); // After camera matrix - camera independent!
// Render the scene!
renderGround();
renderTerrain();
// Swap front- and backbuffers
glutSwapBuffers();
}
static void RenderTerrain()
{
if(gTerrainData)
{
renderTerrainTriangles(*gTerrainData, gTouchedTris.size(), &gTouchedTris[0]);
renderTerrain(*gTerrainData);
}
}
void display()
{
// This function is called whenever it is time to render
// a new frame; due to the idle()-function below, this
// function will get called several times per second
// Clear framebuffer & zbuffer
glClearColor(0.3, 0.4, 0.5, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Setup projection matrix
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(90, 1, 0.01, 500);
// Setup object matrix
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// Enable textures.
glEnable(GL_TEXTURE_2D);
// Fix the SkyBox to the camera.
renderSkyBox();
glPushAttrib(GL_ALL_ATTRIB_BITS);
// Position light 0
GLfloat light_position[] = { 0.0, 1.0, 0.0, 0.0 }; // Directional from above
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
// Set default material properties
GLfloat mat_shininess[] = { 50.0 };
GLfloat mat_diffuseColor[] = { 1.0, 1.0, 1.0, 0.5 };
glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuseColor);
// Enable lighting and light 0
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
// Enable Z-buffering
glEnable(GL_DEPTH_TEST);
// Enable Gouraud shading
glShadeModel(GL_SMOOTH);
// Enable backface culling
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glPushMatrix();
// Enable texturing
glEnable(GL_TEXTURE_2D);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
// Render the terrain
renderTerrain();
// Render some random props (like trees)
renderProps();
// Check if the helicopter hits the ground (if so, exit!)
handleCollisions();
// Update the camera (and helicopter) position
updatePosition();
// Render the helicopter
renderHelicopter();
glPopAttrib();
// Swap front- and backbuffers
glutSwapBuffers();
}
//--------------------------------------------------------------------
// render the view
void Landscape::appViewDraw()
{
mgPoint3 renderEyePt(m_eyePt);
if (m_mapView)
renderEyePt.y = MAPVIEW_HEIGHT;
// draw the sky
mgDisplay->setFrontAndBack(0.25, 16384);
mgMatrix4 identity;
m_eyeMatrix.loadIdentity();
if (m_mapView)
{
m_eyeMatrix.rotateZDeg(m_eyeRotZ);
m_eyeMatrix.rotateYDeg(m_eyeRotY);
m_eyeMatrix.rotateXDeg(-90);
}
else
{
m_eyeMatrix.rotateZDeg(m_eyeRotZ);
m_eyeMatrix.rotateYDeg(m_eyeRotY);
m_eyeMatrix.rotateXDeg(m_eyeRotX);
}
mgDisplay->setEyeMatrix(m_eyeMatrix);
mgDisplay->setEyePt(mgPoint3(0,0,0));
mgDisplay->setModelTransform(identity);
mgDisplay->setCulling(true);
m_sky->setFogColor(m_fogColor);
m_sky->setFogHeight(m_fogBotHeight - renderEyePt.y, m_fogTopHeight - renderEyePt.y);
m_sky->setFogDist(HORIZON_SIZE, m_fogMaxDist);
m_sky->render();
// reset state after any changes in sky render
mgDisplay->setLightDir(m_lightDir.x, m_lightDir.y, m_lightDir.z);
mgDisplay->setMatColor(1.0, 1.0, 1.0);
mgDisplay->setLightColor(m_lightColor.x, m_lightColor.y, m_lightColor.z);
mgDisplay->setLightAmbient(m_lightAmbient.x, m_lightAmbient.y, m_lightAmbient.z);
mgDisplay->setTransparent(false);
mgDisplay->setEyeMatrix(m_eyeMatrix);
mgDisplay->setEyePt(mgPoint3(0,0,0)); // we use relative coordinates in render
if (mgDisplay->getDepthBits() == 32)
{
mgDisplay->setFrontAndBack(0.25, 65536*4);
renderTerrain();
}
else if (mgDisplay->getDepthBits() >= 24)
{
mgDisplay->setFrontAndBack(256, 65536*4);
renderTerrain();
mgDisplay->setFrontAndBack(0.25, 256);
mgDisplay->clearBuffer(MG_DEPTH_BUFFER);
renderTerrain();
}
else
{
mgDisplay->setFrontAndBack(4096, 65536*4);
renderTerrain();
mgDisplay->setFrontAndBack(32, 4096);
mgDisplay->clearBuffer(MG_DEPTH_BUFFER);
renderTerrain();
mgDisplay->setFrontAndBack(0.25, 32);
mgDisplay->clearBuffer(MG_DEPTH_BUFFER);
renderTerrain();
}
}
