C++ (Cpp) matrix4x4f::GetOrient Examples

Example #1

File: Billboard.cpp Project: AmesianX/pioneer

void Billboard::Render(const matrix4x4f &trans, const RenderData *rd)
{
	Graphics::Renderer *r = GetRenderer();

	Graphics::VertexArray va(Graphics::ATTRIB_POSITION | Graphics::ATTRIB_UV0, 6);

	const matrix3x3f rot = trans.GetOrient().Transpose();

	//some hand-tweaked scaling, to make the lights seem larger from distance
	const float size = m_size * Graphics::GetFovFactor() * Clamp(trans.GetTranslate().Length() / 500.f, 0.25f, 15.f);

	const vector3f rotv1 = rot * vector3f(size/2.f, -size/2.f, 0.0f);
	const vector3f rotv2 = rot * vector3f(size/2.f, size/2.f, 0.0f);

	va.Add(m_offset-rotv1, vector2f(0.f, 0.f)); //top left
	va.Add(m_offset-rotv2, vector2f(0.f, 1.f)); //bottom left
	va.Add(m_offset+rotv2, vector2f(1.f, 0.f)); //top right

	va.Add(m_offset+rotv2, vector2f(1.f, 0.f)); //top right
	va.Add(m_offset-rotv2, vector2f(0.f, 1.f)); //bottom left
	va.Add(m_offset+rotv1, vector2f(1.f, 1.f)); //bottom right

	r->SetTransform(trans);
	r->DrawTriangles(&va, m_renderState, m_material.Get());
}

Example #2

File: Billboard.cpp Project: christiank/pioneer

void Billboard::Render(const matrix4x4f &trans, const RenderData *rd)
{
	PROFILE_SCOPED()
	Graphics::Renderer *r = GetRenderer();

	const matrix3x3f rot = trans.GetOrient().Transpose();

	//some hand-tweaked scaling, to make the lights seem larger from distance
	const float size = m_size * Graphics::GetFovFactor() * Clamp(trans.GetTranslate().Length() / 500.f, 0.25f, 15.f);

	const vector3f rotv1 = rot * vector3f(size*0.5f, -size*0.5f, 0.0f);
	const vector3f rotv2 = rot * vector3f(size*0.5f, size*0.5f, 0.0f);

	if( !m_vbuffer.Valid() )
	{
		//create buffer and upload data
		Graphics::VertexBufferDesc vbd;
		vbd.attrib[0].semantic = Graphics::ATTRIB_POSITION;
		vbd.attrib[0].format   = Graphics::ATTRIB_FORMAT_FLOAT3;
		vbd.attrib[1].semantic = Graphics::ATTRIB_UV0;
		vbd.attrib[1].format   = Graphics::ATTRIB_FORMAT_FLOAT2;
		vbd.numVertices = 6;
		vbd.usage = Graphics::BUFFER_USAGE_DYNAMIC;	// we could be updating this per-frame
		m_vbuffer.Reset( r->CreateVertexBuffer(vbd) );
	}

#pragma pack(push, 4)
	struct PosUVVert {
		vector3f pos;
		vector2f uv;
	};
#pragma pack(pop)
	PosUVVert* vtxPtr = m_vbuffer->Map<PosUVVert>(Graphics::BUFFER_MAP_WRITE);
	vtxPtr[0].pos = (m_offset - rotv1); vtxPtr[0].uv = vector2f(0.f, 0.f); //top left
	vtxPtr[1].pos = (m_offset - rotv2); vtxPtr[1].uv = vector2f(0.f, 1.f); //bottom left
	vtxPtr[2].pos = (m_offset + rotv2); vtxPtr[2].uv = vector2f(1.f, 0.f); //top right
	vtxPtr[3].pos = (m_offset + rotv2); vtxPtr[3].uv = vector2f(1.f, 0.f); //top right
	vtxPtr[4].pos = (m_offset - rotv2); vtxPtr[4].uv = vector2f(0.f, 1.f); //bottom left
	vtxPtr[5].pos = (m_offset + rotv1); vtxPtr[5].uv = vector2f(1.f, 1.f); //bottom right
	m_vbuffer->Unmap();

	r->SetTransform(trans);
	r->DrawBuffer(m_vbuffer.Get(), m_renderState, m_material.Get());

	r->GetStats().AddToStatCount(Graphics::Stats::STAT_BILLBOARD, 1);
}