本文整理汇总了C++中ogre::RenderSystem::setScissorTest方法的典型用法代码示例。如果您正苦于以下问题：C++ RenderSystem::setScissorTest方法的具体用法？C++ RenderSystem::setScissorTest怎么用？C++ RenderSystem::setScissorTest使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ogre::RenderSystem的用法示例。
在下文中一共展示了RenderSystem::setScissorTest方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: Render
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);
}