void FrustumCullingApp::update()
{
mFrustumPlaneCached = false;
mAngle -= ( mAngle - mAngleDest ) * 0.1f;
mEye -= ( mEye - mEyeDest ) * 0.2f;
mEyeNormal = Vec3f( sin( mAngle ), 0.0f, cos( mAngle ) );
mCenter = mEye + mEyeNormal * 50.0f;
mCam.setPerspective( 25.0f, getWindowAspectRatio(), 100.0f, 350.0f );
mCam.lookAt( mEye, mCenter, mUp );
calcNearAndFarClipCoordinates( mCam );
if( mIsWatchingCam ){
mREye.lerpEq( mDecay, Vec3f( mEye.x + cos( mCounter * 0.003f ) * 300.0f, 100.0f, mEye.y + sin( mCounter * 0.003f ) * 300.0f ) );
mRCenter.lerpEq( mDecay, Vec3f( mEye + mEyeNormal * 250.0f ) );
mFov -= ( mFov - 60.0f ) * mDecay;
mNear -= ( mNear - 10.0f ) * mDecay;
mFar -= ( mFar - 1500.0f ) * mDecay;
} else {
mREye.lerpEq( mDecay, mEye );
mRCenter.lerpEq( mDecay, mCenter );
mFov -= ( mFov - mCam.getFov() ) * mDecay;
mNear -= ( mNear - mCam.getNearClip() ) * mDecay;
mFar -= ( mFar - mCam.getFarClip() ) * mDecay;
}
mRenderCam.setPerspective( mFov, getWindowAspectRatio(), 10.0f, 1500.0f );
mRenderCam.lookAt( mREye, mRCenter, mUp );
gl::setMatrices( mRenderCam );
mCounter += 1.0f;
}
void MemExploreApp::draw()
{
mTexture = gl::Texture(mDataPointer, GL_RGBA, mVolumeDim * mTilesDim, mVolumeDim * mTilesDim);
mTexture.setWrap(GL_REPEAT, GL_REPEAT);
mTexture.setMinFilter(GL_NEAREST);
mTexture.setMagFilter(GL_NEAREST);
float frustum[6];
mCamera.getFrustum(&frustum[0], &frustum[1], &frustum[2], &frustum[3], &frustum[4], &frustum[5]);
mFbo.bindFramebuffer();
gl::setMatricesWindow(mFbo.getSize(), false);
mProgram.bind();
mProgram.uniform("uTexture", 0);
mProgram.uniform("uVolumeDim", mVolumeDim);
mProgram.uniform("uTilesDim", mTilesDim);
mProgram.uniform("uTime", (float)getElapsedSeconds());
mProgram.uniform("uEyePoint", mCamera.getEyePoint());
mProgram.uniform("uXAxis", mCamera.getOrientation() * Vec3f::xAxis());
mProgram.uniform("uYAxis", mCamera.getOrientation() * Vec3f::yAxis());
mProgram.uniform("uViewDistance", mCamera.getAspectRatio() / abs(frustum[2] - frustum[0]) * mCamera.getNearClip());
mProgram.uniform("uNegViewDir", -mCamera.getViewDirection().normalized());
mProgram.uniform("uAspectRatio", mCamera.getAspectRatio());
mTexture.enableAndBind();
gl::drawSolidRect(mFbo.getBounds());
mTexture.unbind();
mProgram.unbind();
mFbo.unbindFramebuffer();
gl::setMatricesWindow(getWindowSize());
gl::draw(mFbo.getTexture(), getWindowBounds());
}