Render

Basic 2D rendering primitives. More...

Classes
struct	FsQuad
	Quadrilateral primitive. More...
struct	FsTriangle
	Triangle primitive. More...
struct	FsPoint
	Point primitive. More...
struct	FsCircle
	Circle primitive. More...
struct	FsLine
	Line primitive. More...
struct	FsSprite
	Sprite structure. More...

Functions
double	fsLookAt (FsVec2 origin, FsVec2 target, FsDirection forward)
	Calculates the angle to face a target position.
void	fsDrawPoint (const FsPoint *p, int zindex)
	Draws a pixel.
void	fsDrawLine (const FsLine *line, int zindex)
	Draws a line.
void	fsDrawTriangle (const FsTriangle *tri, int zindex)
	Draws a triangle.
void	fsDrawQuad (const FsQuad *quad, int zindex)
	Draws a quadrilateral.
void	fsDrawCircle (const FsCircle *circle, int zindex)
	Draws a circle.
void	fsDrawSprite (const FsSprite *sprite, int zindex)
	Draws a 2D sprite.
void	fsOrthoSet (int width, int height)
	Sets the orthographic projection.
void	fsClear (FsColor color)
	Clears the window.

Detailed Description

Basic 2D rendering primitives.

Function Documentation

fsClear()

void fsClear

(

FsColor

color

)

Clears the window.

Clears the window and OpenGL context using a color.

Parameters

color

Clear color.

fsDrawCircle()

void fsDrawCircle	(	const FsCircle *	circle,
		int	zindex )

Draws a circle.

Draws a colored circle.

Parameters

circle	Circle to draw.
zindex	Rendering order depth.

fsDrawLine()

void fsDrawLine	(	const FsLine *	line,
		int	zindex )

Draws a line.

Draws a colored line.

Parameters

line	Line to draw.
zindex	Rendering order depth.

fsDrawPoint()

void fsDrawPoint	(	const FsPoint *	p,
		int	zindex )

Draws a pixel.

Draws a colored point at the specified position.

Parameters

p	Point to draw.
zindex	Rendering order depth.

fsDrawQuad()

void fsDrawQuad	(	const FsQuad *	quad,
		int	zindex )

Draws a quadrilateral.

Draws a colored quadrilateral.

Parameters

quad	Quadrilateral to draw.
zindex	Rendering order depth.

fsDrawSprite()

void fsDrawSprite	(	const FsSprite *	sprite,
		int	zindex )

Draws a 2D sprite.

Renders a textured sprite using its position, size, rotation angle and texture.

Parameters

sprite	Sprite to draw.
zindex	Rendering order depth.

Note

The sprite texture must be valid and loaded.

Uses OpenGL immediate mode.

fsDrawTriangle()

void fsDrawTriangle	(	const FsTriangle *	tri,
		int	zindex )

Draws a triangle.

Draws a colored triangle.

Parameters

tri	Triangle to draw.
zindex	Rendering order depth.

fsLookAt()

double fsLookAt	(	FsVec2	origin,
		FsVec2	target,
		FsDirection	forward )

Calculates the angle to face a target position.

Computes the rotation angle (in degrees) required for an object at a given origin position to face a target position in 2D space.

The resulting angle is adjusted based on the object's forward direction, allowing different default orientations (up, right, down, or left).

Parameters

origin	Origin position.
target	Target position to look at.
forward	Forward direction of the object.

Returns

Angle in degrees required to face the target.

fsOrthoSet()

void fsOrthoSet	(	int	width,
		int	height )

Sets the orthographic projection.

Defines the orthographic rendering view.

Parameters

width	Width of the view.
height	Height of the view.