void Shader::init(const char *_vsFile, const char *_fsFile)
{
shader_vp = glCreateShader(GL_VERTEX_SHADER);
shader_fp = glCreateShader(GL_FRAGMENT_SHADER);
const char *vsText = textFileRead(_vsFile);
const char *fsText = textFileRead(_fsFile);
if (vsText == nullptr || fsText == nullptr)
{
std::cout << "ERROR: Either vertex or fragment shader file could not be found" << std::endl;
return;
}
glShaderSource(shader_vp, 1, &vsText, 0);
glShaderSource(shader_fp, 1, &fsText, 0);
glCompileShader(shader_vp);
validateShader(shader_vp, _vsFile);
glCompileShader(shader_fp);
validateShader(shader_fp, _fsFile);
shader_id = glCreateProgram();
glAttachShader(shader_id, shader_fp);
glAttachShader(shader_id, shader_vp);
glLinkProgram(shader_id);
validateProgram(shader_id);
delete vsText;
delete fsText;
}
void ShaderFamily::link()
{
// link this shader family
glLinkProgram(m_familyID);
if (!validateProgram(m_familyID))
{
return;
}
m_link = true;
}
void Sun::init () {
token = engine.token;
program = buildProgramFromAssets ("shaders/sun.vsh", "shaders/sun.fsh");
validateProgram (program);
u_MvpMatrixHandle = glGetUniformLocation (program, "u_MvpMatrix");
u_SizeHandle = glGetUniformLocation (program, "u_Size");
u_TexUnitHandle = glGetUniformLocation (program, "u_TexUnit");
a_PositionHandle = glGetAttribLocation (program, "a_Position");
sunTex = loadTextureFromAsset ("textures/sun.png");
}
Cube::Cube () {
program = buildProgramFromAssets ("shaders/simple.vsh", "shaders/simple.fsh");
validateProgram (program);
u_MvpMatrixHandle = glGetUniformLocation (program, "u_MvpMatrix");
a_PositionHandle = glGetAttribLocation (program, "a_Position");
a_ColorHandle = glGetAttribLocation (program, "a_Color");
GLfloat cubeVertices [] = {
// front vertices front colors
-1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
// back vertices back colors
-1.0f, -1.0f, -1.0f, 1.0f, 1.0f, 0.0f,
1.0f, -1.0f, -1.0f, 0.0f, 1.0f, 1.0f,
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 1.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f
};
GLushort cubeElements [] = {
// front
0, 1, 2,
2, 3, 0,
// top
3, 2, 6,
6, 7, 3,
// back
7, 6, 5,
5, 4, 7,
// bottom
4, 5, 1,
1, 0, 4,
// left
4, 0, 3,
3, 7, 4,
// right
1, 5, 6,
6, 2, 1
};
glGenBuffers (1, &vbo);
glBindBuffer (GL_ARRAY_BUFFER, vbo);
glBufferData (GL_ARRAY_BUFFER, sizeof (cubeVertices), cubeVertices, GL_STATIC_DRAW);
glGenBuffers (1, &ibo);
glBindBuffer (GL_ELEMENT_ARRAY_BUFFER, ibo);
glBufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (cubeElements), cubeElements, GL_STATIC_DRAW);
glBindBuffer (GL_ARRAY_BUFFER, 0);
glBindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
}
void GL::Program::validate()
{
validateProgram(m_Handle);
GL::Int logLength = 0;
GL::getProgramiv(m_Handle, GL::INFO_LOG_LENGTH, &logLength);
if (logLength > 0)
{
std::vector<char> log(static_cast<size_t>(logLength + 1), 0);
GL::getProgramInfoLog(m_Handle, logLength, nullptr, log.data());
std::clog << "Validating program \"" << name() << "\":\n" << log.data() << std::endl;
}
}
void Ship::init () {
token = engine.token;
program = buildProgramFromAssets ("shaders/ship.vsh", "shaders/ship.fsh");
validateProgram (program);
u_MvpMatrixHandle = glGetUniformLocation (program, "u_MvpMatrix");
u_MvMatrixHandle = glGetUniformLocation (program, "u_MvMatrix");
u_LightPosHandle = glGetUniformLocation (program, "u_LightPos");
u_EyePosHandle = glGetUniformLocation (program, "u_EyePos");
a_PositionHandle = glGetAttribLocation (program, "a_Position");
a_NormalHandle = glGetAttribLocation (program, "a_Normal");
a_ColorHandle = glGetAttribLocation (program, "a_Color");
vbo = loadObjFromAssets ("objects/ship.obj", "objects/ship.mtl", nvertices);
}
void ShaderProgram::compile()
{
glLinkProgram(shader_id);
validateProgram(shader_id);
}
