void Graphics3D::render(const Matrix &view, const Matrix &proj, const Light *lighting, int flags)
{
if (!getIsVisible()) return;
if (!isValid()) return;
if (lighting == nullptr) {
lighting = defaultLight;
}
Matrix modl = referenceFrame->getModelMatrix();
OpenGLShaderProgram *shaderProgram = shader->getShader();
shaderProgram->use();
OpenGLShaderProgram::Uniform modlMatrix(*shaderProgram, "M");
OpenGLShaderProgram::Uniform viewMatrix(*shaderProgram, "V");
OpenGLShaderProgram::Uniform projMatrix(*shaderProgram, "P");
OpenGLShaderProgram::Uniform selectionHandle(*shaderProgram, "selectionHandle");
modlMatrix.setMatrix4(modl.mat, 1, false);
viewMatrix.setMatrix4(view.mat, 1, false);
projMatrix.setMatrix4(proj.mat, 1, false);
selectionHandle.set(flags ? uniqueHandle : 0);
geometry->activate(shaderProgram);
material->activate(shaderProgram);
lighting->activate(shaderProgram);
geometry->drawElements();
geometry->deactivate(shaderProgram);
material->deactivate(shaderProgram);
lighting->deactivate(shaderProgram);
}
glm::mat4 Camera::projectionMatrix() const
{
//return glm::ortho(-1.0f*m_sideRatio, 1.0f*m_sideRatio, -1.0f, 1.0f, 0.001f, 100000.0f);
if (m_cameraNode.expired())
return glm::perspective<float>(M_PI / 3.0f, m_sideRatio, 0.001f, 100000.0f);
auto realNode = m_cameraNode.lock();
return realNode->projMatrix(m_sideRatio);
}
void cameraRecalculateMatrices(Camera* camera)
{
camera->perspectiveMatrix = projMatrix(camera->FOV, camera->aspectRatio, camera->nearPlane, camera->farPlane);
Vec3 negCamPos;
vec3Scale(&negCamPos, &camera->position, -1.0f);
Mat4 translation = translate(negCamPos);
Quaternion q = quaternion(-camera->rotation.w,camera->rotation.x,camera->rotation.y,camera->rotation.z);
Mat4 rotato;
mat4FromQuaternion(&rotato, &q);
mat4Mul(&camera->transformMatrix, &rotato, &translation);
}
void MeshRenderer :: computeDepthBuffer()
{
ntk::TimeCount tc_depth("computeDepthBuffer", 1);
glReadPixels(0, 0, m_depth_buffer.cols, m_depth_buffer.rows, GL_DEPTH_COMPONENT, GL_FLOAT, m_depth_buffer.data);
tc_depth.elapsedMsecs("-- glReadPixels: ");
cv::Mat1f flipped;
flip(m_depth_buffer, flipped, 0);
m_depth_buffer = flipped;
// FIXME: this is very slow !!!
// gluUnproject is not necessary, or at least one
// could invert the projection Matrix only once.
cv::Mat_<GLdouble> modelMatrix(4,4);
setIdentity(modelMatrix);
cv::Mat_<GLdouble> projMatrix(4,4);
glGetDoublev(GL_PROJECTION_MATRIX,projMatrix[0]);
// projMatrix = projMatrix.inv();
int viewport[4];
glGetIntegerv(GL_VIEWPORT,viewport);
GLdouble objx, objy, objz;
for (int r = 0; r < m_depth_buffer.rows; ++r)
for (int c = 0; c < m_depth_buffer.cols; ++c)
{
double depth = m_depth_buffer(r,c);
if (ntk::flt_eq(depth,1) || ntk::flt_eq(depth,0))
{
m_depth_buffer(r,c) = 0;
continue;
}
gluUnProject(c, r, depth, modelMatrix[0], projMatrix[0], viewport,&objx, &objy, &objz);
// double winz = (2.0*depth)-1;
// double objz = (projMatrix(2,3)) / (winz * projMatrix(3,2) + projMatrix(3,3));
// double objz = ;
m_depth_buffer(r,c) = -objz;
}
tc_depth.elapsedMsecs(" -- after unprojecting points: ");
}
void OgreImGui::renderQueueEnded(Ogre::uint8 queueGroupId, const Ogre::String& invocation,bool& repeatThisInvocation)
{
if ((queueGroupId != Ogre::RENDER_QUEUE_OVERLAY) || (invocation == "SHADOWS"))
{
return;
}
Ogre::RenderSystem* renderSys = Ogre::Root::getSingletonPtr()->getRenderSystem();
Ogre::Viewport* vp = renderSys->_getViewport();
if ((vp == nullptr) || (!vp->getTarget()->isPrimary()) || mFrameEnded)
{
return;
}
mFrameEnded = true;
ImGui::Render();
this->updateVertexData();
ImGuiIO& io = ImGui::GetIO();
// Construct projection matrix, taking texel offset corrections in account (important for DirectX9)
// See also:
// - OGRE-API specific hint: http://www.ogre3d.org/forums/viewtopic.php?f=5&p=536881#p536881
// - IMGUI Dx9 demo solution: https://github.com/ocornut/imgui/blob/master/examples/directx9_example/imgui_impl_dx9.cpp#L127-L138
const float texelOffsetX = renderSys->getHorizontalTexelOffset();
const float texelOffsetY = renderSys->getVerticalTexelOffset();
const float L = texelOffsetX;
const float R = io.DisplaySize.x + texelOffsetX;
const float T = texelOffsetY;
const float B = io.DisplaySize.y + texelOffsetY;
Ogre::Matrix4 projMatrix( 2.0f/(R-L), 0.0f, 0.0f, (L+R)/(L-R),
0.0f, -2.0f/(B-T), 0.0f, (T+B)/(B-T),
0.0f, 0.0f, -1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
mPass->getVertexProgramParameters()->setNamedConstant("ProjectionMatrix", projMatrix);
for(std::list<ImGUIRenderable*>::iterator it = mRenderables.begin(); it!=mRenderables.end(); ++it)
{
mSceneMgr->_injectRenderWithPass(mPass, (*it), false, false, nullptr);
}
}
void OgreImGui::Render()
{
// Construct projection matrix, taking texel offset corrections in account (important for DirectX9)
// See also:
// - OGRE-API specific hint: http://www.ogre3d.org/forums/viewtopic.php?f=5&p=536881#p536881
// - IMGUI Dx9 demo solution: https://github.com/ocornut/imgui/blob/master/examples/directx9_example/imgui_impl_dx9.cpp#L127-L138
ImGuiIO& io = ImGui::GetIO();
Ogre::RenderSystem* renderSys = Ogre::Root::getSingletonPtr()->getRenderSystem();
const float texelOffsetX = renderSys->getHorizontalTexelOffset();
const float texelOffsetY = renderSys->getVerticalTexelOffset();
const float L = texelOffsetX;
const float R = io.DisplaySize.x + texelOffsetX;
const float T = texelOffsetY;
const float B = io.DisplaySize.y + texelOffsetY;
Ogre::Matrix4 projMatrix( 2.0f/(R-L), 0.0f, 0.0f, (L+R)/(L-R),
0.0f, -2.0f/(B-T), 0.0f, (T+B)/(B-T),
0.0f, 0.0f, -1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
mPass->getVertexProgramParameters()->setNamedConstant("ProjectionMatrix", projMatrix);
// Instruct ImGui to Render() and process the resulting CmdList-s
/// Adopted from https://bitbucket.org/ChaosCreator/imgui-ogre2.1-binding
/// ... Commentary on OGRE forums: http://www.ogre3d.org/forums/viewtopic.php?f=5&t=89081#p531059
ImGui::Render();
ImDrawData* draw_data = ImGui::GetDrawData();
Ogre::Viewport* vp = renderSys->_getViewport();
int vpWidth = vp->getActualWidth();
int vpHeight = vp->getActualHeight();
for (int i = 0; i < draw_data->CmdListsCount; ++i)
{
const ImDrawList* draw_list = draw_data->CmdLists[i];
unsigned int startIdx = 0;
for (int j = 0; j < draw_list->CmdBuffer.Size; ++j)
{
// Create a renderable and fill it's buffers
ImGUIRenderable renderable;
const ImDrawCmd *drawCmd = &draw_list->CmdBuffer[j];
renderable.updateVertexData(draw_list->VtxBuffer.Data, &draw_list->IdxBuffer.Data[startIdx], draw_list->VtxBuffer.Size, drawCmd->ElemCount);
// Set scissoring
int scLeft = static_cast<int>(drawCmd->ClipRect.x); // Obtain bounds
int scTop = static_cast<int>(drawCmd->ClipRect.y);
int scRight = static_cast<int>(drawCmd->ClipRect.z);
int scBottom = static_cast<int>(drawCmd->ClipRect.w);
scLeft = scLeft < 0 ? 0 : (scLeft > vpWidth ? vpWidth : scLeft); // Clamp bounds to viewport dimensions
scRight = scRight < 0 ? 0 : (scRight > vpWidth ? vpWidth : scRight);
scTop = scTop < 0 ? 0 : (scTop > vpHeight ? vpHeight : scTop);
scBottom = scBottom < 0 ? 0 : (scBottom > vpHeight ? vpHeight : scBottom);
renderSys->setScissorTest(true, scLeft, scTop, scRight, scBottom);
// Render!
mSceneMgr->_injectRenderWithPass(mPass, &renderable, false, false, nullptr);
// Update counts
startIdx += drawCmd->ElemCount;
}
}
renderSys->setScissorTest(false);
}
Ibl::Matrix44f
Camera::viewProjMatrix() const
{
return viewMatrix() * projMatrix();
}
void
Camera::cacheCameraTransforms() const
{
_cameraTransformCache->set(viewMatrix(), projMatrix(), viewProjMatrix(), translation(), zNear(), zFar(), 1.0f);
}
void Frustum::Update()
{
projMatrix.Zero();
float invWidth = 1 / (nearRight - nearLeft);
float invHeight = 1 / (nearTop - nearBottom);
float invNearFarDist = 1 / (farDist - nearDist);
if (projectionType == FRUSTUM_PERSPECTIVE)
{
float tanThetaY = std::tan(fovy*0.5f);
float tanThetaX = aspectRatio * tanThetaY;
float halfWidth = nearDist * std::tan(tanThetaX);
float halfHeight = nearDist * std::tan(tanThetaY);
// NB: This creates 'uniform' perspective projection matrix,
// which depth range [-1,1], right-handed rules
projMatrix(0, 0) = 2.0f * nearDist * invWidth;
projMatrix(0, 2) = (nearRight + nearLeft) * invWidth;
projMatrix(1, 1) = 2.0f * nearDist * invHeight;
projMatrix(1, 2) = (nearTop + nearBottom) * invHeight;
projMatrix(2, 2) = -(farDist + nearDist) * invNearFarDist;
projMatrix(2, 3) = -2.0f * farDist * nearDist * invNearFarDist;
projMatrix(3, 2) = -1.0f;
}
else if (projectionType == FRUSTUM_ORTHOGRAPHIC)
{
projMatrix(0, 0) = 2 * invWidth;
projMatrix(0, 3) = -(nearRight + nearLeft) * invWidth;
projMatrix(1, 1) = 2 * invHeight;
projMatrix(1, 3) = -(nearTop + nearBottom) * invHeight;
projMatrix(2, 2) = -2.0f * invNearFarDist;
projMatrix(2, 3) = -(farDist + nearDist) * invNearFarDist;
projMatrix(3, 3) = 1.0f;
}
}