anonymous_namespace{terminal.cpp}::Rasterizer Class Reference

Axis-aligned sprite rasterizer with texture sampling. More...

Public Member Functions
void	update_projection (nngn::uvec2 term_size, nngn::uvec2 window_size, const nngn::Graphics::Camera &c)
void	rasterize (std::size_t vbo_n, const nngn::Vertex *vbo, std::size_t ebo_n, const std::uint32_t *ebo, std::size_t n_textures, const Texture *textures, FrameBuffer *framebuffer) const

Private Member Functions
std::array< nngn::vec3, 4 >	to_clip (nngn::Vertex v0, nngn::Vertex v1) const
	Transforms world-space vertices into clip space. More...
nngn::vec2	to_screen (nngn::vec3 v) const
	Transforms clip-space vertices into screen space. More...

Static Private Member Functions
static bool	clip (nngn::vec3 bl, nngn::vec3 tr)
	Checks whether a sprite lies entirely outside of the clip volume. More...
static std::size_t	clamp_floor (float max, float v)
	Clamps value between 0 and max, rounds toward -infinity. More...
static std::size_t	clamp_ceil (float max, float v)
	Clamps value between 0 and max, rounds toward +infinity. More...
static float	uv_coord (float p0, std::size_t p, float p1, float t0, float t1)
	Calculates texture coordinates for a given position in a sprite. More...

Private Attributes
nngn::vec3	size = {}
nngn::mat4	proj = {}

Detailed Description

Axis-aligned sprite rasterizer with texture sampling.

Member Function Documentation

clamp_ceil()

std::size_t anonymous_namespace{terminal.cpp}::Rasterizer::clamp_ceil ( float  max, float  v  )

staticprivate

Clamps value between 0 and max, rounds toward +infinity.

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clamp_floor()

std::size_t anonymous_namespace{terminal.cpp}::Rasterizer::clamp_floor ( float  max, float  v  )

staticprivate

Clamps value between 0 and max, rounds toward -infinity.

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clip()

bool anonymous_namespace{terminal.cpp}::Rasterizer::clip ( nngn::vec3  bl, nngn::vec3  tr  )

staticprivate

Checks whether a sprite lies entirely outside of the clip volume.

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rasterize()

void anonymous_namespace{terminal.cpp}::Rasterizer::rasterize	(	std::size_t	vbo_n,
		const nngn::Vertex *	vbo,
		std::size_t	ebo_n,
		const std::uint32_t *	ebo,
		std::size_t	n_textures,
		const Texture *	textures,
		FrameBuffer *	framebuffer
	)		const

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to_clip()

std::array< nngn::vec3, 4 > anonymous_namespace{terminal.cpp}::Rasterizer::to_clip ( nngn::Vertex  v0, nngn::Vertex  v1  ) const

private

Transforms world-space vertices into clip space.

Returns

{bl, tr, bt, tt}: bottom-left/top-right vertices / texture coordinates

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to_screen()

nngn::vec2 anonymous_namespace{terminal.cpp}::Rasterizer::to_screen ( nngn::vec3  v ) const

private

Transforms clip-space vertices into screen space.

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update_projection()

void anonymous_namespace{terminal.cpp}::Rasterizer::update_projection	(	nngn::uvec2	term_size,
		nngn::uvec2	window_size,
		const nngn::Graphics::Camera &	c
	)

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uv_coord()

float anonymous_namespace{terminal.cpp}::Rasterizer::uv_coord ( float  p0, std::size_t  p, float  p1, float  t0, float  t1  )

staticprivate

Calculates texture coordinates for a given position in a sprite.

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Member Data Documentation

proj

nngn::mat4 anonymous_namespace{terminal.cpp}::Rasterizer::proj = {}

private

size

nngn::vec3 anonymous_namespace{terminal.cpp}::Rasterizer::size = {}

private

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The documentation for this class was generated from the following file:

• src/graphics/terminal.cpp