Surface types and terrain constants in SM64

struct Surface {
    /*0x00*/ TerrainData type;       // surface type constant (SURFACE_*)
    /*0x02*/ TerrainData force;      // parameter for some surface types
    /*0x04*/ s8         flags;       // SURFACE_FLAG_* bitmask
    /*0x05*/ RoomData   room;        // room index (-128..127)
    /*0x06*/ TerrainData lowerY;     // bounding box lower Y
    /*0x08*/ TerrainData upperY;     // bounding box upper Y
    /*0x0A*/ Vec3Terrain vertex1;    // first triangle vertex (s16[3])
    /*0x10*/ Vec3Terrain vertex2;
    /*0x16*/ Vec3Terrain vertex3;
    /*0x1C*/ struct { f32 x; f32 y; f32 z; } normal; // face normal (unit)
    /*0x28*/ f32        originOffset; // plane equation: dot(normal, P) + originOffset = 0
    /*0x2C*/ struct Object *object;   // non-null if this is a dynamic (moving) surface
};

#define SURFACE_IS_PAINTING_WARP(cmd) (cmd >= 0xD3 && cmd < 0xFD)

// Begin a collision data block
COL_INIT()

// Declare N vertices
COL_VERTEX_INIT(vtxNum)

// Individual vertex
COL_VERTEX(x, y, z)

// Begin a group of triangles with a given surface type
COL_TRI_INIT(surfType, triNum)

// A triangle referencing three vertex indices
COL_TRI(v1, v2, v3)

// A triangle with an extra force parameter (flowing water, wind, etc.)
COL_TRI_SPECIAL(v1, v2, v3, param)

// Stop reading triangles for this group (continue to next group)
COL_TRI_STOP()

// End the entire collision block
COL_END()

static const Collision my_platform_collision[] = {
    COL_INIT(),
    COL_VERTEX_INIT(4),
        COL_VERTEX(-200,   0, -200),
        COL_VERTEX( 200,   0, -200),
        COL_VERTEX( 200,   0,  200),
        COL_VERTEX(-200,   0,  200),
    COL_TRI_INIT(SURFACE_DEFAULT, 2),
        COL_TRI(0, 1, 2),
        COL_TRI(0, 2, 3),
    COL_TRI_STOP(),
    COL_END(),
};

COL_WATER_BOX_INIT(num)      // declare num water boxes follow
COL_WATER_BOX(id, x1, z1, x2, z2, y)  // axis-aligned water box