Common types

Gtk 3d Canvas (libgtk3dcanvas) Reference Manual
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struct Gtk3dPoint

struct Gtk3dPoint {
        float x;
        float y;
        float z;
};

A simple 3D points, with the associated cartesian coordinates.

struct Gtk3dExtents

struct Gtk3dExtents {
        float xmin;
        float xmax;
        float ymin;
        float ymax;
        float zmin;
        float zmax;
        float avg; /* = ((xmax-xmin)+(ymax-ymin)+(zmax-zmin))/3 */
};

The extents of a 3D object.

float `xmin`	The minimal X value in this object.
float `xmax`	The maximal X value in this object.
float `ymin`	The minimal Y value in this object.
float `ymax`	The maximal Y value in this object.
float `zmin`	The minimal Z value in this object.
float `zmax`	The maximal Z value in this object.
float `avg`	The center of this object

struct Gtk3dRgbColor

struct Gtk3dRgbColor {
        float r;
        float g;
        float b;
};

How to describe a color

float `r`	red component of the color, between 0 and 1(full staturation).
float `g`	green component of the color, between 0 and 1(full staturation).
float `b`	blue component of the color, between 0 and 1(full staturation).

struct Gtk3dOPoint

struct Gtk3dOPoint {
  /* RGBA color (C4F) */
  float r;
  float g;
  float b;
  float a;
  /* Normal direction (N3F) */
  float nx;
  float ny;
  float nz;
  /* Vertex location (V3F) */
  float x;
  float y;
  float z;
};

A point in a format that OpenGl can represent directly.

float `r`	red component of the color, between 0 and 1(full staturation).
float `g`	green component of the color, between 0 and 1(full staturation).
float `b`	blue component of the color, between 0 and 1(full staturation).
float `a`	alpha of the color, between 0 and 1(full staturation).
float `nx`	normal along the X axis.
float `ny`	normal along the Y axis.
float `nz`	normal along the Z axis.
float `x`	X coordinate.
float `y`	Y coordinate.
float `z`	Z coordinate.

gtk_3dcanvas_transfo_free()

#define gtk_3dcanvas_transfo_free(a) g_free(a)

Frees the previously allocated transformation

a : a transformation