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#include "shader.h"
#include "gfx/gl/glSource.h"
#include <array>
#include <cstddef>
#include <gfx/gl/shaders/fs-basicShader.h>
#include <gfx/gl/shaders/fs-landmassShader.h>
#include <gfx/gl/shaders/fs-waterShader.h>
#include <gfx/gl/shaders/vs-basicShader.h>
#include <gfx/gl/shaders/vs-landmassShader.h>
#include <gfx/gl/shaders/vs-waterShader.h>
#include <glm/glm.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <glm/gtx/transform.hpp>
#include <location.hpp>
#include <maths.h>
#include <stdexcept>
#include <string>
Shader::ProgramHandle::ProgramHandle(GLuint vs, GLuint fs) : viewProjection_uniform {}, model_uniform {}
{
glAttachShader(m_program, vs);
glAttachShader(m_program, fs);
glBindAttribLocation(m_program, 0, "position");
glBindAttribLocation(m_program, 1, "texCoord");
glBindAttribLocation(m_program, 2, "normal");
glLinkProgram(m_program);
GLsource::CheckShaderError(m_program, GL_LINK_STATUS, true, "Error linking shader program");
glValidateProgram(m_program);
GLsource::CheckShaderError(m_program, GL_VALIDATE_STATUS, true, "Invalid shader program");
viewProjection_uniform = glGetUniformLocation(m_program, "viewProjection");
model_uniform = glGetUniformLocation(m_program, "model");
}
Shader::Shader() :
programs {{{
basicShader_vs.compile(),
basicShader_fs.compile(),
},
{
waterShader_vs.compile(),
waterShader_fs.compile(),
},
{
landmassShader_vs.compile(),
landmassShader_fs.compile(),
},
{
landmassShader_vs.compile(),
basicShader_fs.compile(),
}}}
{
}
void
Shader::setView(glm::mat4 proj) const
{
for (const auto & prog : programs) {
glUseProgram(prog.m_program);
glUniformMatrix4fv(prog.viewProjection_uniform, 1, GL_FALSE, glm::value_ptr(proj));
}
}
void
Shader::setUniform(const GLchar * uniform, glm::vec3 v) const
{
for (const auto & prog : programs) {
if (auto loc = glGetUniformLocation(prog.m_program, uniform); loc >= 0) {
glUseProgram(prog.m_program);
glUniform3fv(loc, 1, glm::value_ptr(v));
}
}
}
void
Shader::setModel(const Location & loc, Program pid) const
{
auto & prog = programs[static_cast<std::size_t>(pid)];
glUseProgram(prog.m_program);
if (prog.model_uniform >= 0) {
const auto model {glm::translate(loc.pos) * rotate_ypr(loc.rot)};
glUniformMatrix4fv(prog.model_uniform, 1, GL_FALSE, glm::value_ptr(model));
}
}
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