glhello/Material.cpp at master · mskr/glhello · GitHub

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#include "Material.h"

Material::Material(
  float absorption_wavelength, float absorption_width, float absorption_strength,
  float reflection_wavelength, float reflection_width, float reflection_strength,
  float transmission_strength, float shininess) : InstanceAttribute(sizeof(Material::Array), (GLvoid*) &properties) {

	glm::vec3 absorption_rgb = get_RGB(absorption_wavelength, absorption_width, absorption_strength);
	glm::vec3 reflection_rgb = get_RGB(reflection_wavelength, reflection_width, reflection_strength);
	properties.absorption_rgb_[0] = absorption_rgb.x;
	properties.absorption_rgb_[1] = absorption_rgb.y;
	properties.absorption_rgb_[2] = absorption_rgb.z;
	properties.reflection_rgb_[0] = reflection_rgb.x;
	properties.reflection_rgb_[1] = reflection_rgb.y;
	properties.reflection_rgb_[2] = reflection_rgb.z;
	properties.transmission_strength_ = transmission_strength;
	properties.shininess_ = shininess;
}

Material::Material(float r, float g, float b) : InstanceAttribute(sizeof(Material::Array), (GLvoid*) &properties) {
	properties.reflection_rgb_[0] = r;
	properties.reflection_rgb_[1] = g;
	properties.reflection_rgb_[2] = b;
}

Material::Material() : InstanceAttribute(sizeof(Material::Array), (GLvoid*) &properties,
  "MaterialAbsorption:fff,MaterialReflection:fff,MaterialTransmission:f,MaterialShininess:f.") {
	// Not touching properties (leaving everything default)
}

//TODO A texture can define different material properties at different points of an object
// This can be extended to normalmapping, but maybe this sould be done in a subclass of Material
//Material(Texture texture);

Material::~Material() {
}

glm::vec3 Material::get_RGB(float wavelength, float width, float strength) {
	return Light::hsv_to_rgb(
		Light::wavelength_to_hue(glm::clamp(wavelength, 380.0f, 750.0f)),
		glm::clamp(1.0f - width, 0.0f, 1.0f),
		glm::clamp(strength, 0.0f, 1.0f)
	);
}

// SETTER
//TODO None of the setters works (buffer update must be missing...)
void Material::absorb(float absorption_wavelength, float absorption_width, float absorption_strength) {
	glm::vec3 absorption_rgb = get_RGB(absorption_wavelength, absorption_width, absorption_strength);
	properties.absorption_rgb_[0] = absorption_rgb.x;
	properties.absorption_rgb_[1] = absorption_rgb.y;
	properties.absorption_rgb_[2] = absorption_rgb.z;

	InstanceAttribute::has_changed_ = true;
}

void Material::reflect(float reflection_wavelength, float reflection_width, float reflection_strength) {
	glm::vec3 reflection_rgb = get_RGB(reflection_wavelength, reflection_width, reflection_strength);
	properties.reflection_rgb_[0] = reflection_rgb.x;
	properties.reflection_rgb_[1] = reflection_rgb.y;
	properties.reflection_rgb_[2] = reflection_rgb.z;

	InstanceAttribute::has_changed_ = true;
}

void Material::reflectRGB(float r, float g, float b) {
	properties.reflection_rgb_[0] = r;
	properties.reflection_rgb_[1] = g;
	properties.reflection_rgb_[2] = b;
	InstanceAttribute::has_changed_ = true;
}

void Material::transmit(float transmission_strength) {
	properties.transmission_strength_ = transmission_strength;
	InstanceAttribute::has_changed_ = true;
}

void Material::shine(float shininess) {
	properties.shininess_ = shininess;
	InstanceAttribute::has_changed_ = true;
}