RE: [Algorithms] Q3 and Collision

[Ignacio C. <i6...@ho...>]

Cem UZUNLAR wrote:
> which is true solidness test for walk-able areas?
> CONTENTS_SOLID
> or
> SURF_NONSOLID

I just do this:

if(!(r_shaderrefs[brush->shaderref].content_flags & mask)) return false;

where mask is usually:
#define MASK_PLAYERSOLID (CONTENTS_SOLID|CONTENTS_PLAYERCLIP|CONTENTS_BODY)

note that for monster, misiles, etc. it may be different. The appropiate definitions are in the
public quake3 source code.

i recommend you writing a trace function, that returns a trace_t struct that would be something like
this:

typedef struct {
    bool  allsolid;
    bool  startsolid;
    float  fraction;
    Vec3  endpos;
    Plane  plane;
    int   surfaceFlags;
    int   contents;
} trace_t;

there you return the the fraction of the movement, the end position, the plane that you have colided
with, and the surface and of the content flags.

The surface flags are used for footsteps, and some physic effects.


Ignacio Castano
cas...@ya...