func Bind(bindings interface{}) {
value := reflect.ValueOf(bindings).Elem()
n := value.NumField()
for i := 0; i < n; i++ {
field := value.Field(i)
switch field.Type() {
case bufferType:
buffer := gl.GenBuffer()
field.Set(reflect.ValueOf(buffer))
case textureType:
texture := gl.GenTexture()
field.Set(reflect.ValueOf(texture))
case vaoType:
vao := gl.GenVertexArray()
field.Set(reflect.ValueOf(vao))
case vertexShaderType:
shader := gl.VertexShader(gl.CreateShader(gl.VERTEX_SHADER))
field.Set(reflect.ValueOf(shader))
case fragmentShaderType:
shader := gl.FragmentShader(gl.CreateShader(gl.FRAGMENT_SHADER))
field.Set(reflect.ValueOf(shader))
case programType:
program := gl.CreateProgram()
field.Set(reflect.ValueOf(program))
}
}
}
func NewGeometry(name string, verticies, normals []float64, elements []*DrawElements) *Geometry {
var vertexBuffer gl.Buffer = 0
var normalBuffer gl.Buffer = 0
if len(verticies) > 0 {
vertexBuffer = gl.GenBuffer()
BindArrayData(vertexBuffer, verticies)
}
if len(normals) > 0 {
normalBuffer = gl.GenBuffer()
BindArrayData(normalBuffer, normals)
}
return &Geometry{
name,
vertexBuffer,
normalBuffer,
elements,
}
}
func NewDrawElements(elements []int16, drawType gl.Enum) *DrawElements {
count := len(elements)
if count > 0 {
buffer := gl.GenBuffer()
BindArrayData(buffer, elements)
return &DrawElements{
buffer,
drawType,
count,
}
}
return nil
}