Qt 5.7 | Qt 3D | Qt 3D: Deferred Renderer C++ Example | gbuffer.cpp Example File

Qt 5.7.1 Reference Documentation

# gbuffer.cpp Example File

deferred-renderer-cpp/gbuffer.cpp

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      #include "gbuffer.h"

      GBuffer::GBuffer(Qt3DCore::QNode *parent)
          : Qt3DRender::QRenderTarget(parent)
      {
          const Qt3DRender::QAbstractTexture::TextureFormat formats[AttachmentsCount] = {
              Qt3DRender::QAbstractTexture::RGBA32F,
              Qt3DRender::QAbstractTexture::RGB32F,
              Qt3DRender::QAbstractTexture::RGB16F,
              Qt3DRender::QAbstractTexture::D32F
          };

          const Qt3DRender::QRenderTargetOutput::AttachmentPoint attachmentPoints[AttachmentsCount] = {
              Qt3DRender::QRenderTargetOutput::Color0,
              Qt3DRender::QRenderTargetOutput::Color1,
              Qt3DRender::QRenderTargetOutput::Color2,
              Qt3DRender::QRenderTargetOutput::Depth
          };

          for (int i = 0; i < AttachmentsCount; i++) {
              Qt3DRender::QRenderTargetOutput *output = new Qt3DRender::QRenderTargetOutput(this);

              m_textures[i] = new Qt3DRender::QTexture2D();
              m_textures[i]->setFormat(formats[i]);
              m_textures[i]->setWidth(1024);
              m_textures[i]->setHeight(1024);
              m_textures[i]->setGenerateMipMaps(false);
              m_textures[i]->setWrapMode(Qt3DRender::QTextureWrapMode(Qt3DRender::QTextureWrapMode::ClampToEdge));
              m_textures[i]->setMinificationFilter(Qt3DRender::QAbstractTexture::Linear);
              m_textures[i]->setMagnificationFilter(Qt3DRender::QAbstractTexture::Linear);

              output->setTexture(m_textures[i]);
              output->setAttachmentPoint(attachmentPoints[i]);
              addOutput(output);
          }
      }

      Qt3DRender::QAbstractTexture *GBuffer::colorTexture() const
      {
          return m_textures[Color];
      }

      Qt3DRender::QAbstractTexture *GBuffer::positionTexture() const
      {
          return m_textures[Position];
      }

      Qt3DRender::QAbstractTexture *GBuffer::normalTexture() const
      {
          return m_textures[Normal];
      }

      Qt3DRender::QAbstractTexture *GBuffer::depthTexture() const
      {
          return m_textures[Depth];
      }