charcoal/OpenGLEngine/GLUtil.cpp

#include "GLUtil.h"

#include "stdafx.h"

namespace charcoal
{
	namespace builtin
	{
		namespace glutil
		{
			void clear_screen()
			{
				glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
			}

			void uniform_int(int uniform_index, int value)
			{
				glUniform1i(uniform_index, value);
			}

			void uniform_uint(int uniform_index, unsigned int value)
			{
				glUniform1ui(uniform_index, value);
			}

			void uniform_float(int uniform_index, float value)
			{
				glUniform1f(uniform_index, value);
			}

			void uniform_vec3(int uniform_index, const vec3& value)
			{
				glUniform3fv(uniform_index, 1, &value[0]);
			}

			void uniform_matrix(int uniform_index, const mat4& matrix, bool transpose)
			{
				glUniformMatrix4fv(uniform_index, 1, transpose ? GL_TRUE : GL_FALSE, &matrix[0][0]);
			}

			void uniform_lights(int uniform_index, const std::vector<Light>& lights)
			{
				const int position_size = 1;
				const int ambient_size = 1;
				const int diffuse_size = 1;
				const int specular_exponent_size = 1;
				int current_location = uniform_index;
				for (std::vector<Light>::size_type i = 0; i < lights.size(); ++i)
				{
					glUniform3fv(current_location, 1, &lights[i].position[0]);
					current_location += position_size;
					glUniform3fv(current_location, 1, &lights[i].ambient[0]);
					current_location += ambient_size;
					glUniform3fv(current_location, 1, &lights[i].diffuse[0]);
					current_location += diffuse_size;
				}
			}
		}
	}
}