rasterion

package

v1.4.0 Latest Latest Go to latest Published: Apr 3, 2025 License: MIT Imports: 5 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/cfoust/cy

Links

Open Source Insights

README ¶

rasterion

Package rasterion is a rasterization library for rendering 2D and 3D graphics to the terminal.

Documentation ¶

Index ¶

Variables
func Interpolate(bary gl.Vec3, v0, v1, v2 float32) float32
func InterpolateVec2(bary gl.Vec3, v0, v1, v2 gl.Vec2) gl.Vec2
func Sample2D(texture image.Image, uv gl.Vec2) emu.Glyph
type Camera
- func NewCamera(size geom.Vec2) *Camera
- func (c *Camera) Transform(in gl.Vec3) gl.Vec4
- func (c *Camera) UnProject(in gl.Vec3) (gl.Vec3, error)
- func (c *Camera) Viewport() geom.Vec2
type Context
- func New(size geom.Size) *Context
- func (c *Context) Camera() *Camera
- func (c *Context) Clear()
- func (c *Context) Image() image.Image
- func (c *Context) Resize(size geom.Vec2)
- func (c *Context) Triangle(s Shader, v0, v1, v2 gl.Vec3)
- func (c *Context) TriangleStrip(s Shader, vertices []gl.Vec3)
- func (c *Context) Triangles(s Shader, verts []gl.Vec3, faces [][3]int)
type DefaultVertexShader
- func (v DefaultVertexShader) Vertex(camera *Camera, face, index int, vertex gl.Vec3) gl.Vec4
type Drawable
type FragmentShader
type Rect
- func (r Rect) Overlaps(other Rect) bool
type Shader
type TransformShader
- func (t TransformShader) Transform(v gl.Vec3) gl.Vec4
- func (t TransformShader) Vertex(camera *Camera, face, index int, vertex gl.Vec3) gl.Vec4
type VertexShader

Constants ¶

This section is empty.

Variables ¶

View Source

var StaticShader = func(uv gl.Vec3) emu.Glyph {
	c := emu.EmptyGlyph()
	c.Char = '*'
	return c
}

Functions ¶

func Interpolate ¶

func Interpolate(bary gl.Vec3, v0, v1, v2 float32) float32

func InterpolateVec2 ¶

func InterpolateVec2(bary gl.Vec3, v0, v1, v2 gl.Vec2) gl.Vec2

func Sample2D ¶

func Sample2D(texture image.Image, uv gl.Vec2) emu.Glyph

Sample2D samples a texture at the given coordinate. The members of `uv` should be in the range [0..1].

Types ¶

type Camera ¶

type Camera struct {
	View, Projection gl.Mat4
	// contains filtered or unexported fields
}

func NewCamera ¶

func NewCamera(size geom.Vec2) *Camera

func (*Camera) Transform ¶

func (c *Camera) Transform(in gl.Vec3) gl.Vec4

func (*Camera) UnProject ¶

func (c *Camera) UnProject(in gl.Vec3) (gl.Vec3, error)

Project transforms the given point in screen-space into world-space.

func (*Camera) Viewport ¶

func (c *Camera) Viewport() geom.Vec2

type Context ¶

type Context struct {
	// contains filtered or unexported fields
}

func New ¶

func New(size geom.Size) *Context

func (*Context) Camera ¶

func (c *Context) Camera() *Camera

func (*Context) Clear ¶

func (c *Context) Clear()

func (*Context) Image ¶

func (c *Context) Image() image.Image

func (*Context) Resize ¶

func (c *Context) Resize(size geom.Vec2)

func (*Context) Triangle ¶

func (c *Context) Triangle(s Shader, v0, v1, v2 gl.Vec3)

func (*Context) TriangleStrip ¶

func (c *Context) TriangleStrip(s Shader, vertices []gl.Vec3)

func (*Context) Triangles ¶

func (c *Context) Triangles(
	s Shader,
	verts []gl.Vec3,
	faces [][3]int,
)

type DefaultVertexShader ¶

type DefaultVertexShader struct{}

func (DefaultVertexShader) Vertex ¶

func (v DefaultVertexShader) Vertex(
	camera *Camera, face, index int, vertex gl.Vec3,
) gl.Vec4

type Drawable ¶

type Drawable interface {
	Draw(c *Context)
}

type FragmentShader ¶

type FragmentShader interface {
	Fragment(
		i0, i1, i2 int,
		bary gl.Vec3,
	) (glyph emu.Glyph, discard bool)
}

type Rect ¶

type Rect struct {
	Pos  gl.Vec2
	Size gl.Vec2
}

func (Rect) Overlaps ¶

func (r Rect) Overlaps(other Rect) bool

Overlaps reports whether two Rects overlap.

type Shader ¶

type Shader interface {
	VertexShader
	FragmentShader
}

type TransformShader ¶

type TransformShader struct {
	M gl.Mat4
}

func (TransformShader) Transform ¶

func (t TransformShader) Transform(v gl.Vec3) gl.Vec4

func (TransformShader) Vertex ¶

func (t TransformShader) Vertex(
	camera *Camera, face, index int, vertex gl.Vec3,
) gl.Vec4

type VertexShader ¶

type VertexShader interface {
	Vertex(camera *Camera, face, index int, vertex gl.Vec3) gl.Vec4
}

Source Files ¶

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