Method DrawDisplaySprites

TombEngine/Renderer/RendererDraw2D.cpp:336–411

	}

	void Renderer::DrawDisplaySprites(RenderView& renderView, bool negativePriority)
	{
		constexpr auto VERTEX_COUNT = 4;

		if (renderView.DisplaySpritesToDraw.empty())
			return;

		Texture2D* texture2DPtr = nullptr;
		for (const auto& spriteToDraw : renderView.DisplaySpritesToDraw)
		{
			if ((spriteToDraw.Priority >= 0) == negativePriority)
				continue;

			if (texture2DPtr == nullptr)
			{
				_shaders.Bind(Shader::FullScreenQuad);

				_context->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
				_context->IASetInputLayout(_inputLayout.Get());

				_primitiveBatch->Begin();

				BindTexture(TextureRegister::ColorMap, spriteToDraw.SpritePtr->Texture, SamplerStateRegister::AnisotropicClamp);
				SetBlendMode(spriteToDraw.BlendMode);
			}
			else if (texture2DPtr != spriteToDraw.SpritePtr->Texture || _lastBlendMode != spriteToDraw.BlendMode)
			{
				_primitiveBatch->End();
				_primitiveBatch->Begin();

				BindTexture(TextureRegister::ColorMap, spriteToDraw.SpritePtr->Texture, SamplerStateRegister::AnisotropicClamp);
				SetBlendMode(spriteToDraw.BlendMode);
			}

			// Calculate vertex base.
			auto vertices = std::array<Vector2, VERTEX_COUNT>
			{
				spriteToDraw.Size / 2,
				Vector2(-spriteToDraw.Size.x, spriteToDraw.Size.y) / 2,
				-spriteToDraw.Size / 2,
				Vector2(spriteToDraw.Size.x, -spriteToDraw.Size.y) / 2
			};

			// Transform vertices.
			// NOTE: Must rotate 180 degrees to account for +Y being down.
			auto rotMatrix = Matrix::CreateRotationZ(TO_RAD(spriteToDraw.Orientation + ANGLE(180.0f)));
			for (auto& vertex : vertices)
			{
				// Rotate.
				vertex = Vector2::Transform(vertex, rotMatrix);

				// Apply aspect correction.
				vertex *= spriteToDraw.AspectCorrection;

				// Offset to position and convert to NDC.
				vertex += spriteToDraw.Position;
				vertex = TEN::Utils::Convert2DPositionToNDC(vertex);
			}