/** \brief reads mesh definition.
*
* The read num_normals value is positive when normals are available and negative when light
* values are available. The values get set appropiatly.
*/
void TR_Level::read_tr_mesh(SDL_RWops * const src, tr4_mesh_t & mesh)
{
int i;
read_tr_vertex16(src, mesh.centre);
mesh.collision_size = read_bit16(src);
mesh.flags = read_bitu8(src);
mesh.dummy = read_bitu8(src);
mesh.num_vertices = read_bit16(src);
mesh.vertices = (tr5_vertex_t*)malloc(mesh.num_vertices * sizeof(tr5_vertex_t));
for (i = 0; i < mesh.num_vertices; i++)
read_tr_vertex16(src, mesh.vertices[i]);
mesh.num_normals = read_bit16(src);
if (mesh.num_normals >= 0) {
mesh.num_lights = 0;
mesh.normals = (tr5_vertex_t*)malloc(mesh.num_normals * sizeof(tr5_vertex_t));
for (i = 0; i < mesh.num_normals; i++)
read_tr_vertex16(src, mesh.normals[i]);
} else {
mesh.num_lights = -mesh.num_normals;
mesh.num_normals = 0;
mesh.lights = (int16_t*)malloc(mesh.num_lights * sizeof(int16_t));
for (i = 0; i < mesh.num_lights; i++)
mesh.lights[i] = read_bit16(src);
}
mesh.num_textured_rectangles = read_bit16(src);
mesh.textured_rectangles = (tr4_face4_t*)malloc(mesh.num_textured_rectangles * sizeof(tr4_face4_t));
for (i = 0; i < mesh.num_textured_rectangles; i++)
read_tr_face4(src, mesh.textured_rectangles[i]);
mesh.num_textured_triangles = read_bit16(src);
mesh.textured_triangles = (tr4_face3_t*)malloc(mesh.num_textured_triangles * sizeof(tr4_face3_t));
for (i = 0; i < mesh.num_textured_triangles; i++)
read_tr_face3(src, mesh.textured_triangles[i]);
mesh.num_coloured_rectangles = read_bit16(src);
mesh.coloured_rectangles = (tr4_face4_t*)malloc(mesh.num_coloured_rectangles * sizeof(tr4_face4_t));
for (i = 0; i < mesh.num_coloured_rectangles; i++)
read_tr_face4(src, mesh.coloured_rectangles[i]);
mesh.num_coloured_triangles = read_bit16(src);
mesh.coloured_triangles = (tr4_face3_t*)malloc(mesh.num_coloured_triangles * sizeof(tr4_face3_t));
for (i = 0; i < mesh.num_coloured_triangles; i++)
read_tr_face3(src, mesh.coloured_triangles[i]);
}
/** \brief reads a room portal definition.
*
* A check is preformed to see wether the normal lies on a coordinate axis, if not an exception gets thrown.
*/
void TR_Level::read_tr_room_portal(SDL_RWops * const src, tr_room_portal_t & portal)
{
portal.adjoining_room = read_bitu16(src);
read_tr_vertex16(src, portal.normal);
read_tr_vertex16(src, portal.vertices[0]);
read_tr_vertex16(src, portal.vertices[1]);
read_tr_vertex16(src, portal.vertices[2]);
read_tr_vertex16(src, portal.vertices[3]);
if ((portal.normal.x == 1.0f) && (portal.normal.y == 0.0f) && (portal.normal.z == 0.0f))
return;
if ((portal.normal.x == -1.0f) && (portal.normal.y == 0.0f) && (portal.normal.z == 0.0f))
return;
if ((portal.normal.x == 0.0f) && (portal.normal.y == 1.0f) && (portal.normal.z == 0.0f))
return;
if ((portal.normal.x == 0.0f) && (portal.normal.y == -1.0f) && (portal.normal.z == 0.0f))
return;
if ((portal.normal.x == 0.0f) && (portal.normal.y == 0.0f) && (portal.normal.z == 1.0f))
return;
if ((portal.normal.x == 0.0f) && (portal.normal.y == 0.0f) && (portal.normal.z == -1.0f))
return;
Sys_extWarn("read_tr_room_portal: normal not on world axis");
}
void TR_Level::read_tr3_room_vertex(SDL_RWops * const src, tr5_room_vertex_t & room_vertex)
{
read_tr_vertex16(src, room_vertex.vertex);
// read and make consistent
room_vertex.lighting1 = read_bit16(src);
room_vertex.attributes = read_bitu16(src);
room_vertex.lighting2 = read_bit16(src);
// only in TR5
room_vertex.normal.x = 0;
room_vertex.normal.y = 0;
room_vertex.normal.z = 0;
room_vertex.colour.r = room_vertex.lighting1 / 32767.0f;
room_vertex.colour.g = room_vertex.lighting1 / 32767.0f;
room_vertex.colour.b = room_vertex.lighting1 / 32767.0f;
room_vertex.colour.a = 255;
}
/** \brief reads a room vertex definition.
*
* lighting1 gets converted, so it matches the 0-32768 range introduced in TR3.
* lighting2 is introduced in TR2 and is set to lighting1 for TR1.
* attributes is introduced in TR2 and is set 0 for TR1.
* All other values are introduced in TR5 and get set to appropiate values.
*/
void TR_Level::read_tr_room_vertex(SDL_RWops * const src, tr5_room_vertex_t & room_vertex)
{
read_tr_vertex16(src, room_vertex.vertex);
// read and make consistent
room_vertex.lighting1 = (8191 - read_bit16(src)) << 2;
// only in TR2
room_vertex.lighting2 = room_vertex.lighting1;
room_vertex.attributes = 0;
// only in TR5
room_vertex.normal.x = 0;
room_vertex.normal.y = 0;
room_vertex.normal.z = 0;
room_vertex.colour.r = room_vertex.lighting1 / 32768.0f;
room_vertex.colour.g = room_vertex.lighting1 / 32768.0f;
room_vertex.colour.b = room_vertex.lighting1 / 32768.0f;
room_vertex.colour.a = 1.0f;
}
void TR_Level::read_tr3_room_vertex(SDL_RWops *const src, tr5_room_vertex_t & room_vertex)
{
read_tr_vertex16(src, room_vertex.vertex);
// read and make consistent
room_vertex.lighting1 = read_bit16(src);
room_vertex.attributes = read_bitu16(src);
room_vertex.lighting2 = read_bit16(src);
// only in TR5
room_vertex.normal.x = 0;
room_vertex.normal.y = 0;
room_vertex.normal.z = 0;
room_vertex.colour.r = ((room_vertex.lighting2 & 0x7C00) >> 10 ) / 62.0f;
room_vertex.colour.g = ((room_vertex.lighting2 & 0x03E0) >> 5 ) / 62.0f;
room_vertex.colour.b = ((room_vertex.lighting2 & 0x001F) ) / 62.0f;
room_vertex.colour.a = 1.0f;
}
/** \brief reads a room vertex definition.
*
* lighting1 gets converted, so it matches the 0-32768 range introduced in TR3.
* lighting2 is introduced in TR2 and is set to lighting1 for TR1.
* attributes is introduced in TR2 and is set 0 for TR1.
* All other values are introduced in TR5 and get set to appropiate values.
*/
void TR_Level::read_tr_room_vertex(SDL_RWops * const src, tr5_room_vertex_t & room_vertex)
{
read_tr_vertex16(src, room_vertex.vertex);
// read and make consistent
float data = read_bitu16(src);
data = data < 0.0f || data > 8191.0f ? 0.0f : data;
room_vertex.lighting1 = (8191 - data);
// only in TR2
room_vertex.lighting2 = room_vertex.lighting1;
room_vertex.attributes = 0;
// only in TR5
room_vertex.normal.x = 0;
room_vertex.normal.y = 0;
room_vertex.normal.z = 0;
room_vertex.colour.r = room_vertex.lighting1 / 8191.0f;
room_vertex.colour.g = room_vertex.lighting1 / 8191.0f;
room_vertex.colour.b = room_vertex.lighting1 / 8191.0f;
room_vertex.colour.a = 1.0f;
}