glr

package
v0.0.0-...-ddc071b Latest Latest
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 Go to latest Published: Feb 26, 2023 License: GPL-3.0 Imports: 15 Imported by: 0

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Index

Constants

View Source 
const (
	MIN_PARAM_SIZE      = 10
	COORDS_PER_VERTEX   = 3
	BYTES_PER_FLOAT     = 4
	BYTES_PER_SHORT     = 2
	VERT_POSITION_DATA  = 0
	VERT_ATTR_NORM_DATA = 3
	VERT_ATTR_RGB_DATA  = 6
	VERT_ATTR_UV_DATA   = 9
)

Implements RenderAPIContext & Renderer Interface in float32 Env

View Source 
const (
	VERT_NORM_HALF            = 0
	VERT_NORM_COLOR_HALF      = 1
	VERT_NORM_TEX_HALF        = 2
	VERT_NORM_TEX_COLOR_HALF  = 3
	VERT_NORM_TEX_BINORM_HALF = 4
	VERT_HALF                 = 5
	VERT_COLOR_HALF           = 6
	MAX_VAO_BINDING           = 7
)

VAO Index Array Positions

View Source 
const (
	CAMERA_SPEED = 0.05
)

Variables

This section is empty.

Functions

func InitGLFW 

func InitGLFW(width int, height int, title string) (*glfw.Window, error)

func InitOpenGL 

func InitOpenGL() error

func MatrixTRS 

func MatrixTRS(t []float32, r []float32, s []float32) []float32

Constructs a Matrix from Translation scale rotation quat

func ProcessCursor 

func ProcessCursor(w *glfw.Window, xPos float64, yPos float64)

ProcessCursor - GLFW Callback. While mouse is in state hold calculate a X,Y derivative

func ProcessInput 

func ProcessInput(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey)

func ProcessMouse 

func ProcessMouse(w *glfw.Window, button glfw.MouseButton, action glfw.Action, mods glfw.ModifierKey)

ProcessMouse sets the mouse state structure during click events

func SizeGL 

func SizeGL(typeID string) uint32

Types

type GLRenderer 

type GLRenderer struct {
	MVPMatrix  []float32
	MVPMat     []float32
	VAO        []uint32
	Tex        []uint32
	VBO        []uint32
	ElementVBO []uint32
	Indices    []uint16
	Window     *glfw.Window
	Camera     *camera.Camera
}

OGLRenderer interface type

func Renderer 

func Renderer() *GLRenderer

func (*GLRenderer) AddShader 

func (renderer *GLRenderer) AddShader(path string, gl_shader_type uint32) (uint32, error)

func (*GLRenderer) BindArrayBuffer 

func (renderer *GLRenderer) BindArrayBuffer(vbo_index int)

func (*GLRenderer) BindVertexArray 

func (renderer *GLRenderer) BindVertexArray(vao_index int)

func (*GLRenderer) BufferArrayData 

func (renderer *GLRenderer) BufferArrayData(vboID int, width int, offset int, ref []byte) error

BufferArrayData(vboID, width, byteSize, ref) - binds a VBO and fills its byte data using the simplest terms possible. The rendersystem will need to pass in the unique buffer ID it wants to fill. This VBO ID is not the GL generated VBO id but the reference index. The ref array will need to have the precomputed offset already computed so that ref[0] is the valid buffer data position.

func (*GLRenderer) BufferArrayFloat 

func (renderer *GLRenderer) BufferArrayFloat(vboID int, width int, offset int, ref []float32) error

BufferArrayFloat() - Allocates float buffer to gl vertex buffer object

func (*GLRenderer) BufferArrayPointer 

func (renderer *GLRenderer) BufferArrayPointer(vboID int, width int, ref unsafe.Pointer) error

func (*GLRenderer) BufferIndexData 

func (renderer *GLRenderer) BufferIndexData(vboID int, width int, offset int, ref []byte) error

BufferIndexData(vboID, width, byteSize, ref) - binds a VBO and fills its byte data using the simplest terms possible. The rendersystem will need to pass in the unique buffer ID it wants to fill. This VBO ID is not the GL generated VBO id but the reference index. The ref array will need to have the precomputed offset already computed so that ref[0] is the valid buffer data position.

func (*GLRenderer) Draw 

func (renderer *GLRenderer) Draw(mesh_entities []*defs.MeshEntity, shaders *defs.ShadersMap, materials map[string]*defs.Material, mapID uint32) error

func (*GLRenderer) GetUniformLocation 

func (renderer *GLRenderer) GetUniformLocation(program uint32, name string) (int32, error)

func (*GLRenderer) GetVAO 

func (r *GLRenderer) GetVAO(index int) uint32

func (*GLRenderer) GetVBO 

func (r *GLRenderer) GetVBO(index int) uint32

func (*GLRenderer) InvalidateBuffer 

func (renderer *GLRenderer) InvalidateBuffer(vboID int, width int) error

func (*GLRenderer) Layout 

func (renderer *GLRenderer) Layout(num_vao int, num_vbo int, num_tex int) error
Layout(num_vbo, num_tex)( error) - initializes as many VBOs and Textures as

requested by the RenderSystem caller. The Raw OpenGL handles are then copied into corresponding VAO/VBO/Tex GLRenderer state objects. Initialize VAO State layouts for position, color, tex data descriptions.

func (*GLRenderer) LinkShaders 

func (renderer *GLRenderer) LinkShaders(vertexGLID uint32, fragmentGLID uint32) (uint32, error)

func (*GLRenderer) LoadEnvironment 

func (r *GLRenderer) LoadEnvironment(path string, index int) (uint32, error)

func (*GLRenderer) LoadTexture 

func (r *GLRenderer) LoadTexture(path string, index int) (uint32, error)

func (*GLRenderer) MoveCamera 

func (r *GLRenderer) MoveCamera(dir vector.Vec, mag float32)

func (*GLRenderer) SetActiveTexture 

func (r *GLRenderer) SetActiveTexture(glid uint32, index uint32)

func (*GLRenderer) Setup 

func (renderer *GLRenderer) Setup(width int, height int, title string) error

Setup() - Setup GL Renderer

func (*GLRenderer) ShaderLog 

func (renderer *GLRenderer) ShaderLog(programGLID uint32)

func (*GLRenderer) ShouldClose 

func (renderer *GLRenderer) ShouldClose() bool

func (*GLRenderer) Status 

func (renderer *GLRenderer) Status() error

func (*GLRenderer) SwapBuffers 

func (r *GLRenderer) SwapBuffers()

func (*GLRenderer) Update 

func (r *GLRenderer) Update(dt float64) error

func (*GLRenderer) VertexArrayAttr 

func (renderer *GLRenderer) VertexArrayAttr(index int, components int, gltype uint32, offset int)

type InputState 

type InputState struct {
	Keys      KeyState
	Mouse     MouseState
	Time      time.Time
	DebugPass bool
}
var Input *InputState = new(InputState)

Exposes static OpenGL Input as static global variable for GLFW threaded calls

type KeyState 

type KeyState struct {
	Pressed int
	Time    time.Time
	Vec     vector.Vec
	Scale   float32
	Select  int
}

KeyState holds Key pressed state for GLFW polling

type MouseState 

type MouseState struct {
	Hold     bool
	Position [2]int
	PosX     float64
	PosY     float64
	XRot     float32
	YRot     float32
	Dx       float32
	Dy       float32
	Time     time.Time
}

MouseState holds mouse state for GLFW polling

Source Files

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