void view() {
// 透視変換を操作するお！と宣言
glMatrixMode(GL_PROJECTION);
// 正規行列を読み込む
glLoadIdentity();
glViewport(0, 0, Width, Height);
// 透視変換行列を作成して適用
// glFrustum(GLdouble left, GLdouble right,
// GLdouble bottom, GLdouble top,
// GLdouble near, GLdouble far);
// 左端の座標、右端の座標
// 下端の座標、上端の座標
// 最前面までの距離、最前面までの距離(距離はどちらも0より大きい値)
/*glFrustum( -1, 1,
1, -1,
0.5, 20.0);*/
// Eigenの行列をOpenGLに渡す
float aspect = Width / float(Height);
Eigen::Matrix4f m = perspectiveView(36, aspect, 0.5, 50);
glMultMatrixf(m.data());
// モデリング行列を操作するお！と宣言
glMatrixMode(GL_MODELVIEW);
// 正規行列を読み込む
glLoadIdentity();
}
GLWidget::GLWidget(ttg::Scene * sc, QWidget *parent) : Base3DView(parent)
{
m_scene = sc;
m_scene->setView(perspectiveView() );
perspCamera()->setFarClipPlane(20000.f);
perspCamera()->setNearClipPlane(1.f);
orthoCamera()->setFarClipPlane(20000.f);
orthoCamera()->setNearClipPlane(1.f);
usePerspCamera();
}
void display(void)
{
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
if(displayError)
{
orthographicView();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
txtInstructions.render((screenWidth - txtInstructions.getTextureWidth()) / 2.0f, (screenHeight - txtInstructions.getTextureHeight()) / 2.0f);
glFlush();
return;
}
glPushMatrix();
// Setup the navigation
glTranslated(0, 0, -zoom);
glRotatef(camRotateX, 1, 0, 0);
glRotatef(camRotateY, 0, 1, 0);
glTranslated(0, ROOM_SIZE, 0);
// Setup drawing for the scene.
perspectiveView();
#if _USE_MT
// If the render thread needs to wait for new spheres to be added.
while(pauseSimulation)
{
boost::this_thread::yield();
}
threadStarted();
#endif
renderFrame++;
renderFrameCounter++;
glEnable(GL_DEPTH_TEST);
glColor3f(1.0f, 1.0f, 1.0f);
glUseProgram(g_program);
glUniform3fv(g_programCameraPositionLocation, 1, g_cameraPosition);
glUniform3fv(g_programLightDirectionLocation, 1, g_lightDirection);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, sphereMesh.indexBufferId);
// We are using instanced rendering, however we cannot draw all the spheres at once.
// So we have a maximum number of objects that can be rendered at once and we'll just
// render that many at a time until we have less spheres than MAX_OBJECTS_PER_RENDER
// left to render.
for(int objectIndex = 0; objectIndex < numSpheres; objectIndex += MAX_OBJECTS_PER_RENDER)
{
int numObjects = MAX_OBJECTS_PER_RENDER;
// Are we going to be rendering more spheres than we should?
if (numObjects + objectIndex > numSpheres)
{
numObjects = numSpheres - objectIndex;
}
Vector3 *positionIndex = spherePositions + objectIndex;
glUniform4fv(g_programObjectPositionLocation, numObjects, (float *)positionIndex);
// Tell the shader the size of the user sphere.
// Due to the way the shader renders multiple instances, it only knows the id
// of the current instance it is rendering, which does not reflect the sphere's actual
// id.
// So we will set that the size of the userSphere only on the first instanced render
// and all later renders it will be zero.
glUniform1f(g_programUserSphereLocation, (objectIndex == 0) * userSphereSize);
glDrawElementsInstancedEXT(GL_TRIANGLES, sphereMesh.numIndicies, GL_UNSIGNED_INT, 0, numObjects);
}
glUseProgram(0);
#if _USE_MT
threadStopped();
#endif
glPopMatrix();
// Setup drawing for the interface.
orthographicView();
char buff[64];
sprintf(buff, "FPS: %d", framesPerSecond);
txtRenderFrames.setText(buff);
sprintf(buff, "PPS: %.1f", physicsPerSecond);
txtPhysicsFrames.setText(buff);
glDisable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
float yPos = -2.0f;
txtInstructions.render(10, yPos += 12.0f);
txtInstructions2.render(10, yPos += 12.0f);
txtNumThreads.render(10, yPos += 12.0f);
txtNumSpheres.render(10, yPos += 12.0f);
txtRenderFrames.render(10, yPos += 12.0f);
txtPhysicsFrames.render(10, yPos += 12.0f);
glDisable(GL_BLEND);
glFlush();
}
void GLWidget::clientDraw()
{
updatePerspectiveView();
getDrawer()->frustum(perspectiveView()->frustum() );
m_scene->draw(getDrawer() );
}
