Method DrawCone

src/Nazara/Renderer/DebugDrawer.cpp:438–512

	}

	void DebugDrawer::DrawCone(const Vector3f& origin, const Quaternionf& rotation, float angle, float length)
	{
		if (!Initialize())
		{
			NazaraError("Failed to initialize Debug Drawer");
			return;
		}

		Matrix4f transformMatrix;
		transformMatrix.MakeIdentity();
		transformMatrix.SetRotation(rotation);
		transformMatrix.SetTranslation(origin);

		BufferMapper<VertexBuffer> mapper(s_vertexBuffer, BufferAccess_DiscardAndWrite, 0, 16);
		VertexStruct_XYZ* vertex = static_cast<VertexStruct_XYZ*>(mapper.GetPointer());

		// On calcule le reste des points
		Vector3f base(Vector3f::Forward()*length);

		// Il nous faut maintenant le rayon du cercle projeté à cette distance
		// Tangente = Opposé/Adjaçent <=> Opposé = Adjaçent*Tangente
		float radius = length*std::tan(DegreeToRadian(angle));
		Vector3f lExtend = Vector3f::Left()*radius;
		Vector3f uExtend = Vector3f::Up()*radius;

		vertex->position.Set(transformMatrix * Vector3f::Zero());
		vertex++;
		vertex->position.Set(transformMatrix * (base + lExtend + uExtend));
		vertex++;

		vertex->position.Set(transformMatrix * (base + lExtend + uExtend));
		vertex++;
		vertex->position.Set(transformMatrix * (base + lExtend - uExtend));
		vertex++;

		vertex->position.Set(transformMatrix * Vector3f::Zero());
		vertex++;
		vertex->position.Set(transformMatrix * (base + lExtend - uExtend));
		vertex++;

		vertex->position.Set(transformMatrix * (base + lExtend - uExtend));
		vertex++;
		vertex->position.Set(transformMatrix * (base - lExtend - uExtend));
		vertex++;

		vertex->position.Set(transformMatrix * Vector3f::Zero());
		vertex++;
		vertex->position.Set(transformMatrix * (base - lExtend + uExtend));
		vertex++;

		vertex->position.Set(transformMatrix * (base - lExtend + uExtend));
		vertex++;
		vertex->position.Set(transformMatrix * (base - lExtend - uExtend));
		vertex++;

		vertex->position.Set(transformMatrix * Vector3f::Zero());
		vertex++;
		vertex->position.Set(transformMatrix * (base - lExtend - uExtend));