Method Quad

framework/render/gl20/ogl_2_0_renderer.cpp:361–400

	std::array<Vec2<float>, 4> vertices;
	std::array<Vec2<float>, 4> texcoords;
	Quad(const Rect<float> &position, const Rect<float> texCoords = {{0, 0}, {1, 1}},
	     const Vec2<float> &rotationCenter = {0.0f, 0.0f}, float rotationAngleRadians = 0.0f)
	{
		texcoords = {{
		    Vec2<float>{texCoords.p0},
		    Vec2<float>{texCoords.p1.x, texCoords.p0.y},
		    Vec2<float>{texCoords.p0.x, texCoords.p1.y},
		    Vec2<float>{texCoords.p1},
		}};

		if (rotationAngleRadians != 0.0f)
		{
			auto rotMatrix = glm::rotate(rotationAngleRadians, Vec3<float>{0.0f, 0.0f, 1.0f});
			Vec2<float> size = position.p1 - position.p0;
			vertices = {{
			    Vec2<float>{0.0f, 0.0f},
			    Vec2<float>{size.x, 0.0f},
			    Vec2<float>{0.0f, size.y},
			    Vec2<float>{size},
			}};
			for (auto &p : vertices)
			{
				p -= rotationCenter;
				glm::vec4 transformed = rotMatrix * glm::vec4{p.x, p.y, 0.0f, 1.0f};
				p.x = transformed.x;
				p.y = transformed.y;
				p += rotationCenter;
				p += position.p0;
			}
		}
		else
		{
			vertices = {{
			    Vec2<float>{position.p0},
			    Vec2<float>{position.p1.x, position.p0.y},
			    Vec2<float>{position.p0.x, position.p1.y},
			    Vec2<float>{position.p1},
			}};
		}
	}
	void draw(GLuint vertexAttribPos, GLuint texcoordAttribPos)
	{
		gl20::EnableVertexAttribArray(vertexAttribPos);