Function SetupScreenQuad

trinity/Tr2RenderUtils.cpp:11–51

#include "TriViewport.h"

void SetupScreenQuad( Tr2ScreenVertex quad[4],
					  const Vector2& tlTexCoord,
					  const Vector2& brTexCoord,
					  const Vector2& tlVertexCoord,
					  const Vector2& brVertexCoord )
{
	const TriViewport& viewport = Tr2Renderer::GetViewport();

	Vector2 tlScreen( tlVertexCoord[0] * 2.0f - 1.0f, -( tlVertexCoord[1] * 2.0f - 1.0f ) );
	Vector2 brScreen( brVertexCoord[0] * 2.0f - 1.0f, -( brVertexCoord[1] * 2.0f - 1.0f ) );
	const float z = 1.0f;
	const float w = 1.0f;

	int edge1 = 1;
	int edge2 = 2;

	USE_MAIN_THREAD_RENDER_CONTEXT(); //TODO! pass it in so we look at actual current cull mode
	if( !renderContext.m_esm.IsCullModeInverted() )
	{
		// Flip the interior edge direction in the quad which produces a correctly
		// oriented strip of two triangles
		edge1 = 2;
		edge2 = 1;
	}

	// Top Left
	quad[0].p = Vector4( tlScreen.x, tlScreen.y, z, w );
	quad[0].t = tlTexCoord;

	// Top right
	quad[edge1].p = Vector4( brScreen.x, tlScreen.y, z, w );
	quad[edge1].t = Vector2( brTexCoord.x, tlTexCoord.y );

	// Bottom left
	quad[edge2].p = Vector4( tlScreen.x, brScreen.y, z, w );
	quad[edge2].t = Vector2( tlTexCoord.x, brTexCoord.y );

	// Bottom right
	quad[3].p = Vector4( brScreen.x, brScreen.y, z, w );
	quad[3].t = brTexCoord;
}

void SetupScreenQuadInCameraSpace( Tr2ScreenVertex quad[4], int width, int height )
{