charcoal/OpenGLEngine/MyBuiltinLitScene.cpp

#include "MyBuiltinLitScene.h"

#include "MeshGenerator.h"

#include "constants.h"

MyBuiltinLitScene::MyBuiltinLitScene(Application& application)
	: LitScene(application),
	m_shape(meshgenerator::gen_cube_pn<LitVertex, LitIndex>(DRAW_TRIANGLES, 2.0f, 2.0f, 2.0f), DrawMode::DRAW_TRIANGLES),
	m_camera((float)TAU_1_4, (float)m_screen_size.x / m_screen_size.y, 1.0f, 10.0f, vec3(0.0f, 0.0f, -5.0f)),
	m_batch(add_batch(&m_shape, 1))
{
	add_prerenderable(&m_camera);
	set_camera(&m_camera);

	// Something is off here... The light seems to be rotating...
	add_light(Position(0.0f, 2.0f, -2.0f), ColorRGB(0.2f, 0.2f, 0.2f), ColorRGB(1.0f, 1.0f, 1.0f));
}

void MyBuiltinLitScene::update(float delta_time, clock_t clock)
{
	float brightness;
	float radians;

	clock_t c;
	const clock_t intervals = 512 * CLOCKS_PER_SEC / 100;
	const clock_t half_interval = 256 * CLOCKS_PER_SEC / 100;
	c = clock % intervals;
	if (c < half_interval)
		brightness = (float)c / half_interval;
	else
		brightness = (float)(intervals - c) / half_interval;

	radians = (float)TAU * c / intervals;

	{
		Poseable& pose = m_batch.get_pose(0);
		pose.rotate(glm::normalize(vec3(1.0f, 1.0f, 0.0f)), (float)TAU_1_2 * delta_time);
		pose.update_position(vec3(3 * (float)cos(radians), 0.0f, 0.0f));
	}

	vec3 camera_translation(0.0f, 0.0f, 0.0f);

	if (m_input_manager.is_key_down(GLFW_KEY_W)) camera_translation.y += 1;
	if (m_input_manager.is_key_down(GLFW_KEY_S)) camera_translation.y -= 1;
	if (m_input_manager.is_key_down(GLFW_KEY_A)) camera_translation.x -= 1;
	if (m_input_manager.is_key_down(GLFW_KEY_D)) camera_translation.x += 1;
	if (m_input_manager.is_key_down(GLFW_KEY_Q)) camera_translation.z -= 1;
	if (m_input_manager.is_key_down(GLFW_KEY_E)) camera_translation.z += 1;

	float camera_rotation = 0.0f;
	if (m_input_manager.is_key_down(GLFW_KEY_Z)) camera_rotation += 1;
	if (m_input_manager.is_key_down(GLFW_KEY_C)) camera_rotation -= 1;

	m_camera.translate(camera_translation * delta_time);
	m_camera.rotate(vec3(0.0f, 1.0f, 0.0f), camera_rotation * (float)TAU_1_8 * delta_time);
}