📄 t3dlib5.h
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// T3DLIB5.H - Header file for T3DLIB5.CPP game engine library
// watch for multiple inclusions
#ifndef T3DLIB5
#define T3DLIB5
// DEFINES ////////////////////////////////////////////////////
// defines for enhanced PLG file format -> PLX
// the surface descriptor is still 16-bit now in the following format
// d15 d0
// CSSD | RRRR| GGGG | BBBB
// C is the RGB/indexed color flag
// SS are two bits that define the shading mode
// D is the double sided flag
// and RRRR, GGGG, BBBB are the red, green, blue bits for RGB mode
// or GGGGBBBB is the 8-bit color index for 8-bit mode
// bit masks to simplify testing????
#define PLX_RGB_MASK 0x8000 // mask to extract RGB or indexed color
#define PLX_SHADE_MODE_MASK 0x6000 // mask to extract shading mode
#define PLX_2SIDED_MASK 0x1000 // mask for double sided
#define PLX_COLOR_MASK 0x0fff // xxxxrrrrggggbbbb, 4-bits per channel RGB
// xxxxxxxxiiiiiiii, indexed mode 8-bit index
// these are the comparision flags after masking
// color mode of polygon
#define PLX_COLOR_MODE_RGB_FLAG 0x8000 // this poly uses RGB color
#define PLX_COLOR_MODE_INDEXED_FLAG 0x0000 // this poly uses an indexed 8-bit color
// double sided flag
#define PLX_2SIDED_FLAG 0x1000 // this poly is double sided
#define PLX_1SIDED_FLAG 0x0000 // this poly is single sided
// shading mode of polygon
#define PLX_SHADE_MODE_PURE_FLAG 0x0000 // this poly is a constant color
#define PLX_SHADE_MODE_CONSTANT_FLAG 0x0000 // alias
#define PLX_SHADE_MODE_FLAT_FLAG 0x2000 // this poly uses flat shading
#define PLX_SHADE_MODE_GOURAUD_FLAG 0x4000 // this poly used gouraud shading
#define PLX_SHADE_MODE_PHONG_FLAG 0x6000 // this poly uses phong shading
#define PLX_SHADE_MODE_FASTPHONG_FLAG 0x6000 // this poly uses phong shading (alias)
// defines for polygons and faces version 1
// attributes of polygons and polygon faces
#define POLY4DV1_ATTR_2SIDED 0x0001
#define POLY4DV1_ATTR_TRANSPARENT 0x0002
#define POLY4DV1_ATTR_8BITCOLOR 0x0004
#define POLY4DV1_ATTR_RGB16 0x0008
#define POLY4DV1_ATTR_RGB24 0x0010
#define POLY4DV1_ATTR_SHADE_MODE_PURE 0x0020
#define POLY4DV1_ATTR_SHADE_MODE_CONSTANT 0x0020 // (alias)
#define POLY4DV1_ATTR_SHADE_MODE_FLAT 0x0040
#define POLY4DV1_ATTR_SHADE_MODE_GOURAUD 0x0080
#define POLY4DV1_ATTR_SHADE_MODE_PHONG 0x0100
#define POLY4DV1_ATTR_SHADE_MODE_FASTPHONG 0x0100 // (alias)
#define POLY4DV1_ATTR_SHADE_MODE_TEXTURE 0x0200
// states of polygons and faces
#define POLY4DV1_STATE_ACTIVE 0x0001
#define POLY4DV1_STATE_CLIPPED 0x0002
#define POLY4DV1_STATE_BACKFACE 0x0004
// defines for objects version 1
#define OBJECT4DV1_MAX_VERTICES 1024 // 64
#define OBJECT4DV1_MAX_POLYS 1024 // 128
// states for objects
#define OBJECT4DV1_STATE_ACTIVE 0x0001
#define OBJECT4DV1_STATE_VISIBLE 0x0002
#define OBJECT4DV1_STATE_CULLED 0x0004
// attributes for objects
// render list defines
#define RENDERLIST4DV1_MAX_POLYS 32768// 16384
// transformation control flags
#define TRANSFORM_LOCAL_ONLY 0 // perform the transformation in place on the
// local/world vertex list
#define TRANSFORM_TRANS_ONLY 1 // perfrom the transformation in place on the
// "transformed" vertex list
#define TRANSFORM_LOCAL_TO_TRANS 2 // perform the transformation to the local
// vertex list, but store the results in the
// transformed vertex list
// general culling flags
#define CULL_OBJECT_X_PLANE 0x0001 // cull on the x clipping planes
#define CULL_OBJECT_Y_PLANE 0x0002 // cull on the y clipping planes
#define CULL_OBJECT_Z_PLANE 0x0004 // cull on the z clipping planes
#define CULL_OBJECT_XYZ_PLANES (CULL_OBJECT_X_PLANE | CULL_OBJECT_Y_PLANE | CULL_OBJECT_Z_PLANE)
// defines for camera rotation sequences
#define CAM_ROT_SEQ_XYZ 0
#define CAM_ROT_SEQ_YXZ 1
#define CAM_ROT_SEQ_XZY 2
#define CAM_ROT_SEQ_YZX 3
#define CAM_ROT_SEQ_ZYX 4
#define CAM_ROT_SEQ_ZXY 5
// defines for special types of camera projections
#define CAM_PROJ_NORMALIZED 0x0001
#define CAM_PROJ_SCREEN 0x0002
#define CAM_PROJ_FOV90 0x0004
#define CAM_MODEL_EULER 0x0008
#define CAM_MODEL_UVN 0x0010
#define UVN_MODE_SIMPLE 0
#define UVN_MODE_SPHERICAL 1
// TYPES //////////////////////////////////////////////////////
// a polygon based on an external vertex list
typedef struct POLY4DV1_TYP
{
int state; // state information
int attr; // physical attributes of polygon
int color; // color of polygon
POINT4D_PTR vlist; // the vertex list itself
int vert[3]; // the indices into the vertex list
} POLY4DV1, *POLY4DV1_PTR;
// a self contained polygon used for the render list
typedef struct POLYF4DV1_TYP
{
int state; // state information
int attr; // physical attributes of polygon
int color; // color of polygon
POINT4D vlist[3]; // the vertices of this triangle
POINT4D tvlist[3]; // the vertices after transformation if needed
POLYF4DV1_TYP *next; // pointer to next polygon in list??
POLYF4DV1_TYP *prev; // pointer to previous polygon in list??
} POLYF4DV1, *POLYF4DV1_PTR;
// an object based on a vertex list and list of polygons
typedef struct OBJECT4DV1_TYP
{
int id; // numeric id of this object
char name[64]; // ASCII name of object just for kicks
int state; // state of object
int attr; // attributes of object
float avg_radius; // average radius of object used for collision detection
float max_radius; // maximum radius of object
POINT4D world_pos; // position of object in world
VECTOR4D dir; // rotation angles of object in local
// cords or unit direction vector user defined???
VECTOR4D ux,uy,uz; // local axes to track full orientation
// this is updated automatically during
// rotation calls
int num_vertices; // number of vertices of this object
POINT4D vlist_local[OBJECT4DV1_MAX_VERTICES]; // array of local vertices
POINT4D vlist_trans[OBJECT4DV1_MAX_VERTICES]; // array of transformed vertices
int num_polys; // number of polygons in object mesh
POLY4DV1 plist[OBJECT4DV1_MAX_POLYS]; // array of polygons
} OBJECT4DV1, *OBJECT4DV1_PTR;
// camera version 1
typedef struct CAM4DV1_TYP
{
int state; // state of camera
int attr; // camera attributes
POINT4D pos; // world position of camera used by both camera models
VECTOR4D dir; // angles or look at direction of camera for simple
// euler camera models, elevation and heading for
// uvn model
VECTOR4D u; // extra vectors to track the camera orientation
VECTOR4D v; // for more complex UVN camera model
VECTOR4D n;
VECTOR4D target; // look at target
float view_dist; // focal length
float fov; // field of view for both horizontal and vertical axes
// 3d clipping planes
// if view volume is NOT 90 degree then general 3d clipping
// must be employed
float near_clip_z; // near z=constant clipping plane
float far_clip_z; // far z=constant clipping plane
PLANE3D rt_clip_plane; // the right clipping plane
PLANE3D lt_clip_plane; // the left clipping plane
PLANE3D tp_clip_plane; // the top clipping plane
PLANE3D bt_clip_plane; // the bottom clipping plane
float viewplane_width; // width and height of view plane to project onto
float viewplane_height; // usually 2x2 for normalized projection or
// the exact same size as the viewport or screen window
// remember screen and viewport are synonomous
float viewport_width; // size of screen/viewport
float viewport_height;
float viewport_center_x; // center of view port (final image destination)
float viewport_center_y;
// aspect ratio
float aspect_ratio;
// these matrices are not necessarily needed based on the method of
// transformation, for example, a manual perspective or screen transform
// and or a concatenated perspective/screen, however, having these
// matrices give us more flexibility
MATRIX4X4 mcam; // storage for the world to camera transform matrix
MATRIX4X4 mper; // storage for the camera to perspective transform matrix
MATRIX4X4 mscr; // storage for the perspective to screen transform matrix
} CAM4DV1, *CAM4DV1_PTR;
// object to hold the render list, this way we can have more
// than one render list at a time
typedef struct RENDERLIST4DV1_TYP
{
int state; // state of renderlist ???
int attr; // attributes of renderlist ???
// the render list is an array of pointers each pointing to
// a self contained "renderable" polygon face POLYF4DV1
POLYF4DV1_PTR poly_ptrs[RENDERLIST4DV1_MAX_POLYS];
// additionally to cut down on allocatation, de-allocation
// of polygons each frame, here's where the actual polygon
// faces will be stored
POLYF4DV1 poly_data[RENDERLIST4DV1_MAX_POLYS];
int num_polys; // number of polys in render list
} RENDERLIST4DV1, *RENDERLIST4DV1_PTR;
// CLASSES ////////////////////////////////////////////////////
// PROTOTYPES /////////////////////////////////////////////////
char *Get_Line_PLG(char *buffer, int maxlength, FILE *fp);
float Compute_OBJECT4DV1_Radius(OBJECT4DV1_PTR obj);
int Load_OBJECT4DV1_PLG(OBJECT4DV1_PTR obj, char *filename, VECTOR4D_PTR scale,
VECTOR4D_PTR pos, VECTOR4D_PTR rot);
void Translate_OBJECT4DV1(OBJECT4DV1_PTR obj, VECTOR4D_PTR vt);
void Scale_OBJECT4DV1(OBJECT4DV1_PTR obj, VECTOR4D_PTR vs);
void Build_XYZ_Rotation_MATRIX4X4(float theta_x, float theta_y, float theta_z,
MATRIX4X4_PTR mrot);
void Transform_OBJECT4DV1(OBJECT4DV1_PTR obj, MATRIX4X4_PTR mt,
int coord_select, int transform_basis);
void Rotate_XYZ_OBJECT4DV1(OBJECT4DV1_PTR obj,
float theta_x,
float theta_y,
float theta_z);
void Model_To_World_OBJECT4DV1(OBJECT4DV1_PTR obj, int coord_select=TRANSFORM_LOCAL_TO_TRANS);
int Cull_OBJECT4DV1(OBJECT4DV1_PTR obj, CAM4DV1_PTR cam, int cull_flags);
void Remove_Backfaces_OBJECT4DV1(OBJECT4DV1_PTR obj, CAM4DV1_PTR cam);
void Remove_Backfaces_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list, CAM4DV1_PTR cam);
void World_To_Camera_OBJECT4DV1(OBJECT4DV1_PTR obj, CAM4DV1_PTR cam);
void Camera_To_Perspective_OBJECT4DV1(OBJECT4DV1_PTR obj, CAM4DV1_PTR cam);
void Camera_To_Perspective_Screen_OBJECT4DV1(OBJECT4DV1_PTR obj, CAM4DV1_PTR cam);
void Perspective_To_Screen_OBJECT4DV1(OBJECT4DV1_PTR obj, CAM4DV1_PTR cam);
void Transform_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list, MATRIX4X4_PTR mt,
int coord_select);
void Model_To_World_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list, POINT4D_PTR world_pos,
int coord_select=TRANSFORM_LOCAL_TO_TRANS);
void World_To_Camera_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list, CAM4DV1_PTR cam);
void Camera_To_Perspective_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list,
CAM4DV1_PTR cam);
void Perspective_To_Screen_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list,
CAM4DV1_PTR cam);
void Camera_To_Perspective_Screen_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list,
CAM4DV1_PTR cam);
void Reset_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list);
void Reset_OBJECT4DV1(OBJECT4DV1_PTR obj);
int Insert_POLY4DV1_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list,POLY4DV1_PTR poly);
int Insert_POLYF4DV1_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list, POLYF4DV1_PTR poly);
int Insert_OBJECT4DV1_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list, OBJECT4DV1_PTR obj,
int insert_local=0);
void Draw_OBJECT4DV1_Wire(OBJECT4DV1_PTR obj, UCHAR *video_buffer, int lpitch);
void Draw_RENDERLIST4DV1_Wire(RENDERLIST4DV1_PTR rend_list, UCHAR *video_buffer, int lpitch);
void Draw_OBJECT4DV1_Wire16(OBJECT4DV1_PTR obj, UCHAR *video_buffer, int lpitch);
void Draw_RENDERLIST4DV1_Wire16(RENDERLIST4DV1_PTR rend_list, UCHAR *video_buffer, int lpitch);
void Build_Model_To_World_MATRIX4X4(VECTOR4D_PTR vpos, MATRIX4X4_PTR m);
void Build_Camera_To_Perspective_MATRIX4X4(CAM4DV1_PTR cam, MATRIX4X4_PTR m);
void Build_Perspective_To_Screen_4D_MATRIX4X4(CAM4DV1_PTR cam, MATRIX4X4_PTR m);
void Build_Perspective_To_Screen_MATRIX4X4(CAM4DV1_PTR cam, MATRIX4X4_PTR m);
void Build_Camera_To_Screen_MATRIX4X4(CAM4DV1_PTR cam, MATRIX4X4_PTR m);
void Convert_From_Homogeneous4D_OBJECT4DV1(OBJECT4DV1_PTR obj);
void Convert_From_Homogeneous4D_RENDERLIST4DV1(RENDERLIST4DV1_PTR rend_list);
void Build_CAM4DV1_Matrix_Euler(CAM4DV1_PTR cam, int cam_rot_seq);
void Build_CAM4DV1_Matrix_UVN(CAM4DV1_PTR cam, int mode);
void Init_CAM4DV1(CAM4DV1_PTR cam, int attr, POINT4D_PTR cam_pos,
VECTOR4D_PTR cam_dir, VECTOR4D_PTR cam_target,
float near_clip_z, float far_clip_z, float fov,
float viewport_width, float viewport_height);
// GLOBALS ////////////////////////////////////////////////////
#endif⌨️ 快捷键说明
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