int Game_Main(void *parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!
int index; // looping var
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE))
{
PostMessage(main_window_handle, WM_DESTROY,0,0);
// stop all sounds
DSound_Stop_All_Sounds();
} // end if
// start the timing clock
Start_Clock();
// clear the drawing surface
DDraw_Fill_Surface(lpddsback, 0);
// lock back buffer and copy background into it
DDraw_Lock_Back_Surface();
// draw background
Draw_Bitmap16(&background_bmp, back_buffer, back_lpitch,0);
// unlock back surface
DDraw_Unlock_Back_Surface();
// process the fly ai, move them buzz around dead bodies
Flys_AI();
// draw the flys
for (index=0; index < MAX_FLYS; index++)
Draw_BOB16(&flys[index], lpddsback);
// flip the surfaces
DDraw_Flip();
// sync to 30ish fps
Wait_Clock(30);
// return success
return(1);
} // end Game_Main
int Game_Main(void *parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!
static MATRIX4X4 mrot; // general rotation matrix
static float plight_ang = 0,
slight_ang = 0; // angles for light motion
// use these to rotate objects
static float x_ang = 0, y_ang = 0, z_ang = 0;
// state variables for different rendering modes and help
static int wireframe_mode = 1;
static int backface_mode = 1;
static int lighting_mode = 1;
static int help_mode = 1;
static int zsort_mode = -1;
static int x_clip_mode = 1;
static int y_clip_mode = 1;
static int z_clip_mode = 1;
static float hl = 300, // artificial light height
ks = 1.25; // generic scaling factor to make things look good
char work_string[256]; // temp string
int index; // looping var
// start the timing clock
Start_Clock();
// clear the drawing surface
DDraw_Fill_Surface(lpddsback, 0);
// draw the sky
Draw_Rectangle(0,0, WINDOW_WIDTH-1, WINDOW_HEIGHT-1, RGB16Bit(50,50,200), lpddsback);
// draw the ground
//Draw_Rectangle(0,WINDOW_HEIGHT*.38, WINDOW_WIDTH, WINDOW_HEIGHT, RGB16Bit(25,50,110), lpddsback);
// read keyboard and other devices here
DInput_Read_Keyboard();
// game logic here...
// reset the render list
Reset_RENDERLIST4DV2(&rend_list);
// modes and lights
// wireframe mode
if (keyboard_state[DIK_W])
{
// toggle wireframe mode
if (++wireframe_mode > 1)
wireframe_mode=0;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// backface removal
if (keyboard_state[DIK_B])
{
// toggle backface removal
backface_mode = -backface_mode;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// lighting
if (keyboard_state[DIK_L])
{
// toggle lighting engine completely
lighting_mode = -lighting_mode;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// toggle ambient light
if (keyboard_state[DIK_A])
{
// toggle ambient light
if (lights2[AMBIENT_LIGHT_INDEX].state == LIGHTV2_STATE_ON)
lights2[AMBIENT_LIGHT_INDEX].state = LIGHTV2_STATE_OFF;
else
lights2[AMBIENT_LIGHT_INDEX].state = LIGHTV2_STATE_ON;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// toggle infinite light
if (keyboard_state[DIK_I])
{
// toggle ambient light
if (lights2[INFINITE_LIGHT_INDEX].state == LIGHTV2_STATE_ON)
lights2[INFINITE_LIGHT_INDEX].state = LIGHTV2_STATE_OFF;
else
lights2[INFINITE_LIGHT_INDEX].state = LIGHTV2_STATE_ON;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// toggle point light
if (keyboard_state[DIK_P])
{
// toggle point light
if (lights2[POINT_LIGHT_INDEX].state == LIGHTV2_STATE_ON)
lights2[POINT_LIGHT_INDEX].state = LIGHTV2_STATE_OFF;
else
lights2[POINT_LIGHT_INDEX].state = LIGHTV2_STATE_ON;
// toggle point light
if (lights2[POINT_LIGHT2_INDEX].state == LIGHTV2_STATE_ON)
lights2[POINT_LIGHT2_INDEX].state = LIGHTV2_STATE_OFF;
else
lights2[POINT_LIGHT2_INDEX].state = LIGHTV2_STATE_ON;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// help menu
if (keyboard_state[DIK_H])
{
// toggle help menu
help_mode = -help_mode;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// z-sorting
if (keyboard_state[DIK_Z])
{
// toggle z sorting
zsort_mode = -zsort_mode;
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// next animation
if (keyboard_state[DIK_2])
{
if (++obj_md2.anim_state >= NUM_MD2_ANIMATIONS)
obj_md2.anim_state = 0;
Set_Animation_MD2(&obj_md2, obj_md2.anim_state, MD2_ANIM_SINGLE_SHOT);
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// previous animation
if (keyboard_state[DIK_1])
{
if (--obj_md2.anim_state < 0)
obj_md2.anim_state = NUM_MD2_ANIMATIONS-1;
Set_Animation_MD2(&obj_md2, obj_md2.anim_state, MD2_ANIM_SINGLE_SHOT);
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// replay animation
if (keyboard_state[DIK_3])
{
Set_Animation_MD2(&obj_md2, obj_md2.anim_state, MD2_ANIM_SINGLE_SHOT);
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// replay animation
if (keyboard_state[DIK_4])
{
Set_Animation_MD2(&obj_md2, obj_md2.anim_state, MD2_ANIM_LOOP);
Wait_Clock(100); // wait, so keyboard doesn't bounce
} // end if
// forward/backward
if (keyboard_state[DIK_UP])
{
// move forward
if ( (cam_speed+=1) > MAX_SPEED) cam_speed = MAX_SPEED;
} // end if
else
if (keyboard_state[DIK_DOWN])
{
// move backward
if ((cam_speed-=1) < -MAX_SPEED) cam_speed = -MAX_SPEED;
} // end if
// rotate around y axis or yaw
if (keyboard_state[DIK_RIGHT])
{
cam.dir.y+=5;
// scroll the background
Scroll_Bitmap(&background_bmp, -10);
} // end if
if (keyboard_state[DIK_LEFT])
{
cam.dir.y-=5;
// scroll the background
Scroll_Bitmap(&background_bmp, 10);
} // end if
// scroll sky slowly
Scroll_Bitmap(&background_bmp, -1);
// motion section /////////////////////////////////////////////////////////
// terrain following, simply find the current cell we are over and then
// index into the vertex list and find the 4 vertices that make up the
// quad cell we are hovering over and then average the values, and based
// on the current height and the height of the terrain push the player upward
// the terrain generates and stores some results to help with terrain following
//ivar1 = columns;
//ivar2 = rows;
//fvar1 = col_vstep;
//fvar2 = row_vstep;
int cell_x = (cam.pos.x + TERRAIN_WIDTH/2) / obj_terrain.fvar1;
int cell_y = (cam.pos.z + TERRAIN_HEIGHT/2) / obj_terrain.fvar1;
static float terrain_height, delta;
// test if we are on terrain
if ( (cell_x >=0) && (cell_x < obj_terrain.ivar1) && (cell_y >=0) && (cell_y < obj_terrain.ivar2) )
{
// compute vertex indices into vertex list of the current quad
int v0 = cell_x + cell_y*obj_terrain.ivar2;
int v1 = v0 + 1;
int v2 = v1 + obj_terrain.ivar2;
int v3 = v0 + obj_terrain.ivar2;
// now simply index into table
terrain_height = 0.25 * (obj_terrain.vlist_trans[v0].y + obj_terrain.vlist_trans[v1].y +
obj_terrain.vlist_trans[v2].y + obj_terrain.vlist_trans[v3].y);
// compute height difference
delta = terrain_height - (cam.pos.y - gclearance);
// test for penetration
if (delta > 0)
{
// apply force immediately to camera (this will give it a springy feel)
vel_y+=(delta * (VELOCITY_SCALER));
// test for pentration, if so move up immediately so we don't penetrate geometry
cam.pos.y+=(delta*CAM_HEIGHT_SCALER);
// now this is more of a hack than the physics model :) let move the front
// up and down a bit based on the forward velocity and the gradient of the
// hill
cam.dir.x -= (delta*PITCH_CHANGE_RATE);
} // end if
} // end if
// decelerate camera
if (cam_speed > (CAM_DECEL) ) cam_speed-=CAM_DECEL;
else
if (cam_speed < (-CAM_DECEL) ) cam_speed+=CAM_DECEL;
else
cam_speed = 0;
// force camera to seek a stable orientation
if (cam.dir.x > (neutral_pitch+PITCH_RETURN_RATE)) cam.dir.x -= (PITCH_RETURN_RATE);
else
if (cam.dir.x < (neutral_pitch-PITCH_RETURN_RATE)) cam.dir.x += (PITCH_RETURN_RATE);
else
cam.dir.x = neutral_pitch;
// apply gravity
vel_y+=gravity;
// test for absolute sea level and push upward..
if (cam.pos.y < sea_level)
{
vel_y = 0;
cam.pos.y = sea_level;
} // end if
// move camera
cam.pos.x += cam_speed*Fast_Sin(cam.dir.y);
cam.pos.z += cam_speed*Fast_Cos(cam.dir.y);
cam.pos.y += vel_y;
// move point light source in ellipse around game world
lights2[POINT_LIGHT_INDEX].pos.x = 500*Fast_Cos(plight_ang);
//lights2[POINT_LIGHT_INDEX].pos.y = 200;
lights2[POINT_LIGHT_INDEX].pos.z = 500*Fast_Sin(plight_ang);
// move point light source in ellipse around game world
lights2[POINT_LIGHT2_INDEX].pos.x = 200*Fast_Cos(-2*plight_ang);
//lights2[POINT_LIGHT2_INDEX].pos.y = 400;
lights2[POINT_LIGHT2_INDEX].pos.z = 200*Fast_Sin(-2*plight_ang);
if ((plight_ang+=1) > 360)
plight_ang = 0;
// generate camera matrix
Build_CAM4DV1_Matrix_Euler(&cam, CAM_ROT_SEQ_ZYX);
//////////////////////////////////////////////////////////////////////////
// the terrain
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV2(&obj_terrain);
// generate rotation matrix around y axis
//Build_XYZ_Rotation_MATRIX4X4(x_ang, y_ang, z_ang, &mrot);
MAT_IDENTITY_4X4(&mrot);
// rotate the local coords of the object
Transform_OBJECT4DV2(&obj_terrain, &mrot, TRANSFORM_LOCAL_TO_TRANS,1);
// perform world transform
Model_To_World_OBJECT4DV2(&obj_terrain, TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV2_RENDERLIST4DV2(&rend_list, &obj_terrain,0);
//////////////////////////////////////////////////////////////////////////
int v0, v1, v2, v3; // used to track vertices
VECTOR4D pl, // position of the light
po, // position of the occluder object/vertex
vlo, // vector from light to object
ps; // position of the shadow
float rs, // radius of shadow
t; // parameter t
//////////////////////////////////////////////////////////////////////////
// render model, this next section draws each copy of the mech model
//////////////////////////////////////////////////////////////////////////
// animate the model
Animate_MD2(&obj_md2);
// extract the frame of animation from vertex banks
Extract_MD2_Frame(&obj_model, // pointer to destination object
&obj_md2); // md2 object to extract frame from
// set position of object
obj_model.world_pos.x = 0;
obj_model.world_pos.y = 100;
obj_model.world_pos.z = 0;
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV2(&obj_model);
// create identity matrix
MAT_IDENTITY_4X4(&mrot);
// transform the local coords of the object
Transform_OBJECT4DV2(&obj_model, &mrot, TRANSFORM_LOCAL_TO_TRANS,1);
// perform world transform
Model_To_World_OBJECT4DV2(&obj_model, TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV2_RENDERLIST4DV2(&rend_list, &obj_model,0);
// set position of object
obj_model.world_pos.x = 0;
obj_model.world_pos.y = 100;
obj_model.world_pos.z = 200;
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV2(&obj_model);
// create identity matrix
MAT_IDENTITY_4X4(&mrot);
// transform the local coords of the object
Transform_OBJECT4DV2(&obj_model, &mrot, TRANSFORM_LOCAL_TO_TRANS,1);
// perform world transform
Model_To_World_OBJECT4DV2(&obj_model, TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV2_RENDERLIST4DV2(&rend_list, &obj_model,0);
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
// draw all the light objects to represent the position of light sources
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV2(&obj_light_array[INDEX_RED_LIGHT_INDEX]);
// set position of object to light
obj_light_array[INDEX_RED_LIGHT_INDEX].world_pos = lights2[POINT_LIGHT_INDEX].pos;
// create identity matrix
MAT_IDENTITY_4X4(&mrot);
// transform the local coords of the object
Transform_OBJECT4DV2(&obj_light_array[INDEX_RED_LIGHT_INDEX], &mrot, TRANSFORM_LOCAL_TO_TRANS,1);
// perform world transform
Model_To_World_OBJECT4DV2(&obj_light_array[INDEX_RED_LIGHT_INDEX], TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV2_RENDERLIST4DV2(&rend_list, &obj_light_array[INDEX_RED_LIGHT_INDEX],0);
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV2(&obj_light_array[INDEX_YELLOW_LIGHT_INDEX]);
// set position of object to light
obj_light_array[INDEX_YELLOW_LIGHT_INDEX].world_pos = lights2[POINT_LIGHT2_INDEX].pos;
// create identity matrix
MAT_IDENTITY_4X4(&mrot);
// transform the local coords of the object
Transform_OBJECT4DV2(&obj_light_array[INDEX_YELLOW_LIGHT_INDEX], &mrot, TRANSFORM_LOCAL_TO_TRANS,1);
// perform world transform
Model_To_World_OBJECT4DV2(&obj_light_array[INDEX_YELLOW_LIGHT_INDEX], TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV2_RENDERLIST4DV2(&rend_list, &obj_light_array[INDEX_YELLOW_LIGHT_INDEX],0);
////////////////////////////////////////////////////////////////////////////////////
// reset number of polys rendered
debug_polys_rendered_per_frame = 0;
debug_polys_lit_per_frame = 0;
// perform rendering pass one
// remove backfaces
if (backface_mode==1)
Remove_Backfaces_RENDERLIST4DV2(&rend_list, &cam);
// apply world to camera transform
World_To_Camera_RENDERLIST4DV2(&rend_list, &cam);
// clip the polygons themselves now
Clip_Polys_RENDERLIST4DV2(&rend_list, &cam, CLIP_POLY_X_PLANE | CLIP_POLY_Y_PLANE | CLIP_POLY_Z_PLANE );
// light scene all at once
if (lighting_mode==1)
{
Transform_LIGHTSV2(lights2, 4, &cam.mcam, TRANSFORM_LOCAL_TO_TRANS);
Light_RENDERLIST4DV2_World2_16(&rend_list, &cam, lights2, 4);
} // end if
// sort the polygon list (hurry up!)
if (zsort_mode == 1)
Sort_RENDERLIST4DV2(&rend_list, SORT_POLYLIST_AVGZ);
// apply camera to perspective transformation
Camera_To_Perspective_RENDERLIST4DV2(&rend_list, &cam);
// apply screen transform
Perspective_To_Screen_RENDERLIST4DV2(&rend_list, &cam);
// lock the back buffer
DDraw_Lock_Back_Surface();
// draw background
Draw_Bitmap16(&background_bmp, back_buffer, back_lpitch,0);
// reset number of polys rendered
debug_polys_rendered_per_frame = 0;
// render the object
if (wireframe_mode == 0)
Draw_RENDERLIST4DV2_Wire16(&rend_list, back_buffer, back_lpitch);
else
if (wireframe_mode == 1)
{
// perspective mode affine texturing
// set up rendering context
rc.attr = RENDER_ATTR_ZBUFFER
// | RENDER_ATTR_ALPHA
// | RENDER_ATTR_MIPMAP
// | RENDER_ATTR_BILERP
| RENDER_ATTR_TEXTURE_PERSPECTIVE_AFFINE;
// initialize zbuffer to 0 fixed point
Clear_Zbuffer(&zbuffer, (16000 << FIXP16_SHIFT));
// set up remainder of rendering context
rc.video_buffer = back_buffer;
rc.lpitch = back_lpitch;
rc.mip_dist = 0;
rc.zbuffer = (UCHAR *)zbuffer.zbuffer;
rc.zpitch = WINDOW_WIDTH*4;
rc.rend_list = &rend_list;
rc.texture_dist = 0;
rc.alpha_override = -1;
// render scene
Draw_RENDERLIST4DV2_RENDERCONTEXTV1_16_2(&rc);
} // end if
// now make second rendering pass and draw shadow
// reset the render list
Reset_RENDERLIST4DV2(&rend_list);
//////////////////////////////////////////////////////////////////////////
// project shaded object into shadow by projecting it's vertices onto
// the ground plane
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV2(&obj_model);
// save the shading attributes/color of each polygon, and override them with
// attributes of a shadow then restore them
int pcolor[OBJECT4DV2_MAX_POLYS], // used to store color
pattr[OBJECT4DV2_MAX_POLYS]; // used to store attribute
// save all the color and attributes for each polygon
for (int pindex = 0; pindex < obj_model.num_polys; pindex++)
{
// save attribute and color
pattr[pindex] = obj_model.plist[pindex].attr;
pcolor[pindex] = obj_model.plist[pindex].color;
// set attributes for shadow rendering
obj_model.plist[pindex].attr = POLY4DV2_ATTR_RGB16 | POLY4DV2_ATTR_SHADE_MODE_CONSTANT | POLY4DV2_ATTR_TRANSPARENT;
obj_model.plist[pindex].color = RGB16Bit(50,50,50) + (7 << 24);
} // end for pindex
// create identity matrix
MAT_IDENTITY_4X4(&mrot);
// solve for t when the projected vertex intersects ground plane
pl = lights2[POINT_LIGHT_INDEX].pos;
// transform each local/model vertex of the object mesh and store result
// in "transformed" vertex list, note
for (int vertex=0; vertex < obj_model.num_vertices; vertex++)
{
POINT4D presult; // hold result of each transformation
// compute parameter t0 when projected ray pierces y=0 plane
VECTOR4D vi;
// set position of object
obj_model.world_pos.x = 0;
obj_model.world_pos.y = 100;
obj_model.world_pos.z = 0;
// transform coordinates to worldspace right now...
VECTOR4D_Add(&obj_model.vlist_local[vertex].v, &obj_model.world_pos, &vi);
float t0 = -pl.y / (vi.y - pl.y);
// transform point
obj_model.vlist_trans[vertex].v.x = pl.x + t0*(vi.x - pl.x);
obj_model.vlist_trans[vertex].v.y = 10.0; // pl.y + t0*(vi.y - pl.y);
obj_model.vlist_trans[vertex].v.z = pl.z + t0*(vi.z - pl.z);
obj_model.vlist_trans[vertex].v.w = 1.0;
} // end for index
// insert the object into render list
Insert_OBJECT4DV2_RENDERLIST4DV2(&rend_list, &obj_model,0);
// and now second shadow object from second light source...
// solve for t when the projected vertex intersects
pl = lights2[POINT_LIGHT_INDEX].pos;
// transform each local/model vertex of the object mesh and store result
// in "transformed" vertex list
for (vertex=0; vertex < obj_model.num_vertices; vertex++)
{
POINT4D presult; // hold result of each transformation
// compute parameter t0 when projected ray pierces y=0 plane
VECTOR4D vi;
// set position of object
obj_model.world_pos.x = 0;
obj_model.world_pos.y = 100;
obj_model.world_pos.z = 200;
// transform coordinates to worldspace right now...
VECTOR4D_Add(&obj_model.vlist_local[vertex].v, &obj_model.world_pos, &vi);
float t0 = -pl.y / (vi.y - pl.y);
// transform point
obj_model.vlist_trans[vertex].v.x = pl.x + t0*(vi.x - pl.x);
obj_model.vlist_trans[vertex].v.y = 10.0; // pl.y + t0*(vi.y - pl.y);
obj_model.vlist_trans[vertex].v.z = pl.z + t0*(vi.z - pl.z);
obj_model.vlist_trans[vertex].v.w = 1.0;
} // end for index
// insert the object into render list
Insert_OBJECT4DV2_RENDERLIST4DV2(&rend_list, &obj_model,0);
// restore attributes and color
for (pindex = 0; pindex < obj_model.num_polys; pindex++)
{
// save attribute and color
obj_model.plist[pindex].attr = pattr[pindex];
obj_model.plist[pindex].color = pcolor[pindex];
} // end for pindex
//////////////////////////////////////////////////////////////////////////
// remove backfaces
if (backface_mode==1)
Remove_Backfaces_RENDERLIST4DV2(&rend_list, &cam);
// apply world to camera transform
World_To_Camera_RENDERLIST4DV2(&rend_list, &cam);
// clip the polygons themselves now
Clip_Polys_RENDERLIST4DV2(&rend_list, &cam, CLIP_POLY_X_PLANE | CLIP_POLY_Y_PLANE | CLIP_POLY_Z_PLANE );
// light scene all at once
if (lighting_mode==1)
{
Transform_LIGHTSV2(lights2, 4, &cam.mcam, TRANSFORM_LOCAL_TO_TRANS);
Light_RENDERLIST4DV2_World2_16(&rend_list, &cam, lights2, 4);
} // end if
// sort the polygon list (hurry up!)
if (zsort_mode == 1)
Sort_RENDERLIST4DV2(&rend_list, SORT_POLYLIST_AVGZ);
// apply camera to perspective transformation
Camera_To_Perspective_RENDERLIST4DV2(&rend_list, &cam);
// apply screen transform
Perspective_To_Screen_RENDERLIST4DV2(&rend_list, &cam);
// render the object
if (wireframe_mode == 0)
Draw_RENDERLIST4DV2_Wire16(&rend_list, back_buffer, back_lpitch);
else
if (wireframe_mode == 1)
{
// perspective mode affine texturing
// set up rendering context
rc.attr = RENDER_ATTR_ZBUFFER
| RENDER_ATTR_ALPHA
// | RENDER_ATTR_MIPMAP
// | RENDER_ATTR_BILERP
| RENDER_ATTR_TEXTURE_PERSPECTIVE_AFFINE;
// initialize zbuffer to 0 fixed point
//Clear_Zbuffer(&zbuffer, (16000 << FIXP16_SHIFT));
// set up remainder of rendering context
rc.video_buffer = back_buffer;
rc.lpitch = back_lpitch;
rc.mip_dist = 0;
rc.zbuffer = (UCHAR *)zbuffer.zbuffer;
rc.zpitch = WINDOW_WIDTH*4;
rc.rend_list = &rend_list;
rc.texture_dist = 0;
rc.alpha_override = -1;
// render scene
Draw_RENDERLIST4DV2_RENDERCONTEXTV1_16_3(&rc);
} // end if
// unlock the back buffer
DDraw_Unlock_Back_Surface();
// draw cockpit
//Draw_BOB16(&cockpit, lpddsback);
// draw instructions
Draw_Text_GDI("Press ESC to exit. Press <H> for Help.", 0, 0, RGB(255,255,255), lpddsback);
// should we display help
int text_y = 16;
if (help_mode==1)
{
// draw help menu
Draw_Text_GDI("<A>..............Toggle ambient light source.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<I>..............Toggle infinite light source.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<P>..............Toggle point light source.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<W>..............Toggle wire frame/solid mode.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<B>..............Toggle backface removal.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<Z>..............Toggle Z-sorting.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<1>,<2>..........Previous/Next Animation.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<3>,<4>..........Play Animation Single Shot/Looped.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<H>..............Toggle Help.", 0, text_y+=12, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<ESC>............Exit demo.", 0, text_y+=12, RGB(255,255,255), lpddsback);
} // end help
sprintf(work_string,"Lighting [%s]: Ambient=%d, Infinite=%d, Point=%d, BckFceRM [%s], Zsort[%s]",
((lighting_mode == 1) ? "ON" : "OFF"),
lights2[AMBIENT_LIGHT_INDEX].state,
lights2[INFINITE_LIGHT_INDEX].state,
lights2[POINT_LIGHT_INDEX].state,
((backface_mode == 1) ? "ON" : "OFF"),
((zsort_mode == 1) ? "ON" : "OFF") );
Draw_Text_GDI(work_string, 0+1, WINDOW_HEIGHT-34+1, RGB(0,0,0), lpddsback);
Draw_Text_GDI(work_string, 0, WINDOW_HEIGHT-34, RGB(255,255,255), lpddsback);
sprintf(work_string,"Polys Rendered: %d, Polys lit: %d Anim[%d]=%s Frm=%d", debug_polys_rendered_per_frame, debug_polys_lit_per_frame, obj_md2.anim_state,md2_anim_strings[obj_md2.anim_state], obj_md2.curr_frame );
Draw_Text_GDI(work_string, 0+1, WINDOW_HEIGHT-34-2*16+1, RGB(0,0,0), lpddsback);
Draw_Text_GDI(work_string, 0, WINDOW_HEIGHT-34-2*16, RGB(255,255,255), lpddsback);
sprintf(work_string,"CAM [%5.2f, %5.2f, %5.2f], CELL [%d, %d]", cam.pos.x, cam.pos.y, cam.pos.z, cell_x, cell_y);
Draw_Text_GDI(work_string, 0+1, WINDOW_HEIGHT-34-3*16+1, RGB(0,0,0), lpddsback);
Draw_Text_GDI(work_string, 0, WINDOW_HEIGHT-34-3*16, RGB(255,255,255), lpddsback);
// flip the surfaces
DDraw_Flip2();
// sync to 30ish fps
Wait_Clock(30);
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || keyboard_state[DIK_ESCAPE])
{
PostMessage(main_window_handle, WM_DESTROY,0,0);
} // end if
// return success
return(1);
} // end Game_Main
int Game_Main(void *parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!
int index; // looping var
static int delay = 30; // initial delay per frame
// start the timing clock
DWORD start_time = Start_Clock();
// lock back buffer and copy background into it
DDraw_Lock_Back_Surface();
// draw background
Draw_Bitmap16(&background_bmp, back_buffer, back_lpitch,0);
// unlock back surface
DDraw_Unlock_Back_Surface();
// read keyboard
DInput_Read_Keyboard();
// update delay
if (keyboard_state[DIK_RIGHT])
delay+=5;
else
if (delay > 5 && keyboard_state[DIK_LEFT])
delay-=5;
// draw the ship
ship.x = ship.varsF[SHIP_X_POS]+0.5;
ship.y = ship.varsF[SHIP_Y_POS]+0.5;
ship.curr_frame = 0;
Draw_BOB(&ship, lpddsback);
// draw shadow
ship.curr_frame = 1;
ship.x-=64;
ship.y+=128;
Draw_BOB(&ship, lpddsback);
// draw the title
Draw_Text_GDI("(16-Bit Version) Time Based Kinematic Motion DEMO, Press <ESC> to Exit.",10, 10,RGB(255,255,255), lpddsback);
sprintf(buffer, "Frame rate = %f, use <RIGHT>, <LEFT> arrows to change load", 1000*1/(float)delay );
Draw_Text_GDI(buffer,10, 25,RGB(255,255,255), lpddsback);
sprintf(buffer,"Ship Velocity is %f pixels/sec",1000*ship.varsF[SHIP_X_VEL]);
Draw_Text_GDI(buffer,10, 40,RGB(255,255,255), lpddsback);
// this models the load in the game
Wait_Clock(delay);
// flip the surfaces
DDraw_Flip();
// move the ship based on time //////////////////////////////////
// x = x + v*dt
// compute dt
float dt = Get_Clock() - start_time; // in milliseconds
// move based on 30 pixels per seconds or .03 pixels per millisecond
ship.varsF[SHIP_X_POS]+=(ship.varsF[SHIP_X_VEL]*dt);
// test for off screen
if (ship.varsF[SHIP_X_POS] > screen_width+ship.width)
ship.varsF[SHIP_X_POS] = -ship.width;
//////////////////////////////////////////////////////
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || keyboard_state[DIK_ESCAPE])
{
PostMessage(main_window_handle, WM_DESTROY,0,0);
// stop all sounds
DSound_Stop_All_Sounds();
} // end if
// return success
return(1);
} // end Game_Main
int Game_Main(void *parms, int num_parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!
int index; // looping var
int dx,dy; // general deltas used in collision detection
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || KEY_DOWN(VK_SPACE))
PostMessage(main_window_handle, WM_DESTROY,0,0);
// start the timing clock
Start_Clock();
// clear the drawing surface
DDraw_Fill_Surface(lpddsback, 0);
// get joystick data
lpdijoy->Poll(); // this is needed for joysticks only
lpdijoy->GetDeviceState(sizeof(DIJOYSTATE2), (LPVOID)&joy_state);
// lock the back buffer
DDraw_Lock_Back_Surface();
// draw the background reactor image
Draw_Bitmap16(&playfield, back_buffer, back_lpitch, 0);
// unlock the back buffer
DDraw_Unlock_Back_Surface();
// is the player moving?
blaster.x+=joy_state.lX;
blaster.y+=joy_state.lY;
// test bounds
if (blaster.x > SCREEN_WIDTH-32)
blaster.x = SCREEN_WIDTH-32;
else
if (blaster.x < 0)
blaster.x = 0;
if (blaster.y > SCREEN_HEIGHT-32)
blaster.y = SCREEN_HEIGHT-32;
else
if (blaster.y < SCREEN_HEIGHT-128)
blaster.y = SCREEN_HEIGHT-128;
// is player firing?
if (joy_state.rgbButtons[0])
Start_Missile();
// move and draw missle
Move_Missile();
Draw_Missile();
// is it time to blink eyes
if ((rand()%100)==50)
Set_Animation_BOB(&blaster,0);
// draw blaster
Animate_BOB(&blaster);
Draw_BOB16(&blaster,lpddsback);
// draw some text
Draw_Text_GDI("(16-Bit Version) Let's Rock!!!",0,0,RGB(255,255,255),lpddsback);
// display joystick and buttons 0-7
sprintf(buffer,"Joystick Stats: X-Axis=%d, Y-Axis=%d, buttons(%d,%d,%d,%d,%d,%d,%d,%d)",
joy_state.lX,joy_state.lY,
joy_state.rgbButtons[0],
joy_state.rgbButtons[1],
joy_state.rgbButtons[2],
joy_state.rgbButtons[3],
joy_state.rgbButtons[4],
joy_state.rgbButtons[5],
joy_state.rgbButtons[6],
joy_state.rgbButtons[7]);
Draw_Text_GDI(buffer,0,SCREEN_HEIGHT-20,RGB(255,255,50),lpddsback);
// print out name of joystick
sprintf(buffer, "Joystick Name & Vendor: %s",joyname);
Draw_Text_GDI(buffer,0,SCREEN_HEIGHT-40,RGB(255,255,50),lpddsback);
// flip the surfaces
DDraw_Flip();
// sync to 30 fps
Wait_Clock(30);
// return success
return(1);
} // end Game_Main
int Game_Init(void *parms, int num_parms)
{
// this function is where you do all the initialization
// for your game
int index; // looping var
char filename[80]; // used to build up files names
// start up DirectDraw (replace the parms as you desire)
DDraw_Init(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_BPP, WINDOWED_APP);
// joystick creation section ////////////////////////////////
// first create the direct input object
if (DirectInput8Create(main_instance,DIRECTINPUT_VERSION, IID_IDirectInput8, (void **)&lpdi,NULL)!=DI_OK)
return(0);
// first find the f*****g GUID of your particular joystick
lpdi->EnumDevices(DI8DEVCLASS_GAMECTRL,
DI_Enum_Joysticks,
&joystickGUID,
DIEDFL_ATTACHEDONLY | DIEDFL_FORCEFEEDBACK);
if (lpdi->CreateDevice(joystickGUID, &lpdijoy, NULL)!=DI_OK)
return(0);
// set cooperation level
if (lpdijoy->SetCooperativeLevel(main_window_handle,
DISCL_EXCLUSIVE | DISCL_BACKGROUND)!=DI_OK)
return(0);
// set data format
if (lpdijoy->SetDataFormat(&c_dfDIJoystick2)!=DI_OK)
return(0);
// set the range of the joystick
DIPROPRANGE joy_axis_range;
// first x axis
joy_axis_range.lMin = -32;
joy_axis_range.lMax = 32;
joy_axis_range.diph.dwSize = sizeof(DIPROPRANGE);
joy_axis_range.diph.dwHeaderSize = sizeof(DIPROPHEADER);
joy_axis_range.diph.dwObj = DIJOFS_X;
joy_axis_range.diph.dwHow = DIPH_BYOFFSET;
lpdijoy->SetProperty(DIPROP_RANGE,&joy_axis_range.diph);
// now y-axis
joy_axis_range.lMin = -32;
joy_axis_range.lMax = 32;
joy_axis_range.diph.dwSize = sizeof(DIPROPRANGE);
joy_axis_range.diph.dwHeaderSize = sizeof(DIPROPHEADER);
joy_axis_range.diph.dwObj = DIJOFS_Y;
joy_axis_range.diph.dwHow = DIPH_BYOFFSET;
lpdijoy->SetProperty(DIPROP_RANGE,&joy_axis_range.diph);
// and now the dead band
DIPROPDWORD dead_band; // here's our property word
dead_band.diph.dwSize = sizeof(dead_band);
dead_band.diph.dwHeaderSize = sizeof(dead_band.diph);
dead_band.diph.dwObj = DIJOFS_X;
dead_band.diph.dwHow = DIPH_BYOFFSET;
// 4 will be used on both sides of the range +/-
dead_band.dwData = 1000;
// finally set the property
lpdijoy->SetProperty(DIPROP_DEADZONE,&dead_band.diph);
dead_band.diph.dwSize = sizeof(dead_band);
dead_band.diph.dwHeaderSize = sizeof(dead_band.diph);
dead_band.diph.dwObj = DIJOFS_Y;
dead_band.diph.dwHow = DIPH_BYOFFSET;
// 4 will be used on both sides of the range +/-
dead_band.dwData = 1000;
// finally set the property
lpdijoy->SetProperty(DIPROP_DEADZONE,&dead_band.diph);
// acquire the joystick
if (lpdijoy->Acquire()!=DI_OK)
return(0);
// force feedback setup
DWORD dwAxes[2] = { DIJOFS_X, DIJOFS_Y };
LONG lDirection[2] = { 0, 0 };
DIPERIODIC diPeriodic; // type-specific parameters
DIENVELOPE diEnvelope; // envelope
DIEFFECT diEffect; // general parameters
// setup the periodic structure
diPeriodic.dwMagnitude = DI_FFNOMINALMAX;
diPeriodic.lOffset = 0;
diPeriodic.dwPhase = 0;
diPeriodic.dwPeriod = (DWORD) (0.05 * DI_SECONDS);
// set the modulation envelope
diEnvelope.dwSize = sizeof(DIENVELOPE);
diEnvelope.dwAttackLevel = 0;
diEnvelope.dwAttackTime = (DWORD) (0.01 * DI_SECONDS);
diEnvelope.dwFadeLevel = 0;
diEnvelope.dwFadeTime = (DWORD) (3.0 * DI_SECONDS);
// set up the effect structure itself
diEffect.dwSize = sizeof(DIEFFECT);
diEffect.dwFlags = DIEFF_POLAR | DIEFF_OBJECTOFFSETS;
diEffect.dwDuration = (DWORD) INFINITE; // (1 * DI_SECONDS);
// set up details of effect
diEffect.dwSamplePeriod = 0; // = default
diEffect.dwGain = DI_FFNOMINALMAX; // no scaling
diEffect.dwTriggerButton = DIJOFS_BUTTON0; // connect effect to trigger button
diEffect.dwTriggerRepeatInterval = 0;
diEffect.cAxes = 2;
diEffect.rgdwAxes = dwAxes;
diEffect.rglDirection = &lDirection[0];
diEffect.lpEnvelope = &diEnvelope;
diEffect.cbTypeSpecificParams = sizeof(diPeriodic);
diEffect.lpvTypeSpecificParams = &diPeriodic;
// create the effect and get the interface to it
lpdijoy->CreateEffect(GUID_Square, // standard GUID
&diEffect, // where the data is
&lpdieffect, // where to put interface pointer
NULL); // no aggregation
///////////////////////////////////////////////////////////
// load the background
Load_Bitmap_File(&bitmap16bit, "MUSH_24.BMP");
// load in the four frames of the mushroom
for (index=0; index<4; index++)
{
// create mushroom bitmaps
Create_Bitmap(&mushrooms[index],0,0,32,32,16);
Load_Image_Bitmap16(&mushrooms[index],&bitmap16bit,index,0,BITMAP_EXTRACT_MODE_CELL);
} // end for index
// now create the bug blaster bob
Create_BOB(&blaster,0,0,32,32,3,
BOB_ATTR_VISIBLE | BOB_ATTR_MULTI_ANIM | BOB_ATTR_ANIM_ONE_SHOT,
DDSCAPS_SYSTEMMEMORY,0,16);
// load in the four frames of the mushroom
for (index=0; index<3; index++)
Load_Frame_BOB16(&blaster,&bitmap16bit,index,index,1,BITMAP_EXTRACT_MODE_CELL);
// unload the bitmap file
Unload_Bitmap_File(&bitmap16bit);
// set the animation sequences for bug blaster
Load_Animation_BOB(&blaster,0,5,blaster_anim);
// set up stating state of bug blaster
Set_Pos_BOB(&blaster,320, 400);
Set_Anim_Speed_BOB(&blaster,3);
// create mushroom playfield bitmap
Create_Bitmap(&playfield,0,0,SCREEN_WIDTH,SCREEN_HEIGHT,16);
playfield.attr |= BITMAP_ATTR_LOADED;
// fill in the background
Load_Bitmap_File(&bitmap16bit, "GRASS_24.BMP");
// load the grass bitmap image
Load_Image_Bitmap16(&playfield,&bitmap16bit,0,0,BITMAP_EXTRACT_MODE_ABS);
Unload_Bitmap_File(&bitmap16bit);
// seed random number generator
srand(Start_Clock());
// create the random mushroom patch
for (index=0; index<50; index++)
{
// select a mushroom
int mush = rand()%4;
// set mushroom to random position
mushrooms[mush].x = rand()%(SCREEN_WIDTH-32);
mushrooms[mush].y = rand()%(SCREEN_HEIGHT-128);
// now draw the mushroom into playfield
Draw_Bitmap16(&mushrooms[mush], playfield.buffer, playfield.width*2,1);
} // end for
// hide the mouse
if (!WINDOWED_APP)
ShowCursor(FALSE);
// return success
return(1);
} // end Game_Init
int Game_Init(void *parms, int num_parms)
{
// this function is where you do all the initialization
// for your game
int index; // looping var
char filename[80]; // used to build up files names
// start up DirectDraw (replace the parms as you desire)
DDraw_Init(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_BPP, WINDOWED_APP);
// joystick creation section ////////////////////////////////
/// start up DirectInput
DInput_Init();
// initialize the joystick
DInput_Init_Joystick(-24,24,-24,24);
///////////////////////////////////////////////////////////
// load the background
Load_Bitmap_File(&bitmap16bit, "MUSH_24.BMP");
// load in the four frames of the mushroom
for (index=0; index<4; index++)
{
// create mushroom bitmaps
Create_Bitmap(&mushrooms[index],0,0,32,32,16);
Load_Image_Bitmap16(&mushrooms[index],&bitmap16bit,index,0,BITMAP_EXTRACT_MODE_CELL);
} // end for index
// now create the bug blaster bob
Create_BOB(&blaster,0,0,32,32,3,
BOB_ATTR_VISIBLE | BOB_ATTR_MULTI_ANIM | BOB_ATTR_ANIM_ONE_SHOT,
DDSCAPS_SYSTEMMEMORY,0,16);
// load in the four frames of the mushroom
for (index=0; index < 3; index++)
Load_Frame_BOB16(&blaster,&bitmap16bit,index,index,1,BITMAP_EXTRACT_MODE_CELL);
// unload the bitmap file
Unload_Bitmap_File(&bitmap16bit);
// set the animation sequences for bug blaster
Load_Animation_BOB(&blaster,0,5,blaster_anim);
// set up stating state of bug blaster
Set_Pos_BOB(&blaster,320, 400);
Set_Anim_Speed_BOB(&blaster,3);
// create mushroom playfield bitmap
Create_Bitmap(&playfield,0,0,SCREEN_WIDTH,SCREEN_HEIGHT, 16);
playfield.attr |= BITMAP_ATTR_LOADED;
// fill in the background
Load_Bitmap_File(&bitmap16bit, "GRASS_24.BMP");
// load the grass bitmap image
Load_Image_Bitmap16(&playfield,&bitmap16bit,0,0,BITMAP_EXTRACT_MODE_ABS);
Unload_Bitmap_File(&bitmap16bit);
// seed random number generator
srand(Start_Clock());
// create the random mushroom patch
for (index=0; index<50; index++)
{
// select a mushroom
int mush = rand()%4;
// set mushroom to random position
mushrooms[mush].x = rand()%(SCREEN_WIDTH-32);
mushrooms[mush].y = rand()%(SCREEN_HEIGHT-128);
// now draw the mushroom into playfield
Draw_Bitmap16(&mushrooms[mush], playfield.buffer, playfield.width*2,1);
} // end for
// hide the mouse
if (!WINDOWED_APP)
ShowCursor(FALSE);
// return success
return(1);
} // end Game_Init
int Game_Main(void *parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!
int index; // looping var
// start the timing clock
Start_Clock();
// clear the drawing surface
//DDraw_Fill_Surface(lpddsback, 0);
// lock back buffer and copy background into it
DDraw_Lock_Back_Surface();
// draw background
Draw_Bitmap16(&background_bmp, back_buffer, back_lpitch,0);
// draw table
HLine16(TABLE_MIN_X, TABLE_MAX_X, TABLE_MIN_Y, RGB16Bit(0,255,0), back_buffer, back_lpitch);
HLine16(TABLE_MIN_X, TABLE_MAX_X, TABLE_MAX_Y, RGB16Bit(0,255,0), back_buffer, back_lpitch);
VLine16(TABLE_MIN_Y, TABLE_MAX_Y, TABLE_MIN_X, RGB16Bit(0,255,0), back_buffer, back_lpitch);
VLine16(TABLE_MIN_Y, TABLE_MAX_Y, TABLE_MAX_X, RGB16Bit(0,255,0), back_buffer, back_lpitch);
// unlock back surface
DDraw_Unlock_Back_Surface();
// read keyboard
DInput_Read_Keyboard();
// check for change of e
if (keyboard_state[DIK_RIGHT])
cof_E+=.01;
else
if (keyboard_state[DIK_LEFT])
cof_E-=.01;
float total_ke_x = 0, total_ke_y = 0;
// move all the balls and compute system momentum
for (index=0; index < NUM_BALLS; index++)
{
// move the ball
balls[index].varsF[INDEX_X]+=balls[index].varsF[INDEX_XV];
balls[index].varsF[INDEX_Y]+=balls[index].varsF[INDEX_YV];
// add x,y contributions to kinetic energy
total_ke_x+=(balls[index].varsF[INDEX_XV]*balls[index].varsF[INDEX_XV]*balls[index].varsF[INDEX_MASS]);
total_ke_y+=(balls[index].varsF[INDEX_YV]*balls[index].varsF[INDEX_YV]*balls[index].varsF[INDEX_MASS]);
} // end fof
// test for boundary collision with virtual table edge, no need for collision
// response here, I know what's going to happen :)
for (index=0; index < NUM_BALLS; index++)
{
if ((balls[index].varsF[INDEX_X] >= TABLE_MAX_X-BALL_RADIUS) ||
(balls[index].varsF[INDEX_X] <= TABLE_MIN_X+BALL_RADIUS))
{
// invert velocity
balls[index].varsF[INDEX_XV] = -balls[index].varsF[INDEX_XV];
balls[index].varsF[INDEX_X]+=balls[index].varsF[INDEX_XV];
balls[index].varsF[INDEX_Y]+=balls[index].varsF[INDEX_YV];
// start a hit sound
Ball_Sound();
} // end if
if ((balls[index].varsF[INDEX_Y] >= TABLE_MAX_Y-BALL_RADIUS) ||
(balls[index].varsF[INDEX_Y] <= TABLE_MIN_Y+BALL_RADIUS))
{
// invert velocity
balls[index].varsF[INDEX_YV] =-balls[index].varsF[INDEX_YV];
balls[index].varsF[INDEX_X]+=balls[index].varsF[INDEX_XV];
balls[index].varsF[INDEX_Y]+=balls[index].varsF[INDEX_YV];
// play sound
Ball_Sound();
} // end if
} // end for index
// draw the balls
for (index=0; index < NUM_BALLS; index++)
{
balls[index].x = balls[index].varsF[INDEX_X]+0.5-BALL_RADIUS;
balls[index].y = balls[index].varsF[INDEX_Y]+0.5-BALL_RADIUS;
Draw_BOB16(&balls[index], lpddsback);
} // end for
// draw the velocity vectors
DDraw_Lock_Back_Surface();
for (index=0; index < NUM_BALLS; index++)
{
Draw_Clip_Line16(balls[index].varsF[INDEX_X]+0.5,
balls[index].varsF[INDEX_Y]+0.5,
balls[index].varsF[INDEX_X]+2*balls[index].varsF[INDEX_XV]+0.5,
balls[index].varsF[INDEX_Y]+2*balls[index].varsF[INDEX_YV]+0.5,
RGB16Bit(255,255,255), back_buffer, back_lpitch);
} // end for
DDraw_Unlock_Back_Surface();
// draw the title
Draw_Text_GDI("(16-Bit Version) ELASTIC Object-Object Collision Response DEMO, Press <ESC> to Exit.",10, 10,RGB(255,255,255), lpddsback);
// draw the title
sprintf(buffer,"Coefficient of Restitution e=%f, use <RIGHT>, <LEFT> arrow to change.", cof_E);
Draw_Text_GDI(buffer,10, 30,RGB(255,255,255), lpddsback);
sprintf(buffer,"Total System Kinetic Energy Sum(1/2MiVi^2)=%f ",0.5*sqrt(total_ke_x*total_ke_x+total_ke_y*total_ke_y));
Draw_Text_GDI(buffer,10, 465, RGB(255,255,255), lpddsback);
// flip the surfaces
DDraw_Flip();
// run collision response algorithm here
Collision_Response();
// sync to 30 fps = 1/30sec = 33 ms
Wait_Clock(33);
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || keyboard_state[DIK_ESCAPE])
{
PostMessage(main_window_handle, WM_DESTROY,0,0);
// stop all sounds
DSound_Stop_All_Sounds();
} // end if
// return success
return(1);
} // end Game_Main
int Game_Main(void *parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!
int index; // looping var
static rotate = 0;
// start the timing clock
Start_Clock();
// lock back buffer and copy background into it
DDraw_Lock_Back_Surface();
// draw background
Draw_Bitmap16(&background_bmp, back_buffer, back_lpitch,0);
// draw shape
Draw_Polygon2D16(&shape, back_buffer, back_lpitch);
// have a little fun
if (++rotate > 10)
{
Rotate_Polygon2D(&shape,1);
rotate=0;
}
// unlock back surface
DDraw_Unlock_Back_Surface();
// read keyboard
DInput_Read_Keyboard();
// move the balls and compute collisions
Compute_Collisions();
// draw the balls
for (index=0; index < NUM_BALLS; index++)
{
balls[index].x = balls[index].varsF[INDEX_X]+0.5-BALL_RADIUS;
balls[index].y = balls[index].varsF[INDEX_Y]+0.5-BALL_RADIUS;
Draw_BOB16(&balls[index], lpddsback);
} // end for
// draw the velocity vectors
DDraw_Lock_Back_Surface();
for (index=0; index < NUM_BALLS; index++)
{
Draw_Clip_Line16(balls[index].varsF[INDEX_X]+0.5,
balls[index].varsF[INDEX_Y]+0.5,
balls[index].varsF[INDEX_X]+2*balls[index].varsF[INDEX_XV]+0.5,
balls[index].varsF[INDEX_Y]+2*balls[index].varsF[INDEX_YV]+0.5,
RGB16Bit(255,255,255), back_buffer, back_lpitch);
} // end for
DDraw_Unlock_Back_Surface();
// draw the title
Draw_Text_GDI("(16-Bit Version) Object to Contour Collision DEMO, Press <ESC> to Exit.",10, 10,RGB(255,255,255), lpddsback);
// flip the surfaces
DDraw_Flip();
// run collision algorithm here
Compute_Collisions();
// sync to 30 fps = 1/30sec = 33 ms
Wait_Clock(33);
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || keyboard_state[DIK_ESCAPE])
{
PostMessage(main_window_handle, WM_DESTROY,0,0);
// stop all sounds
DSound_Stop_All_Sounds();
} // end if
// return success
return(1);
} // end Game_Main
int Game_Main(void *parms, int num_parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!
int index; // looping var
int dx,dy; // general deltas used in collision detection
static int player_moving = 0; // tracks player motion
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || KEY_DOWN(VK_SPACE))
PostMessage(main_window_handle, WM_DESTROY,0,0);
// start the timing clock
Start_Clock();
// clear the drawing surface
DDraw_Fill_Surface(lpddsback, 0);
// lock the back buffer
DDraw_Lock_Back_Surface();
// draw the background reactor image
Draw_Bitmap16(&reactor, back_buffer, back_lpitch, 0);
// unlock the back buffer
DDraw_Unlock_Back_Surface();
// get player input
// get the keyboard data
lpdikey->GetDeviceState(256, (LPVOID)keyboard_state);
// reset motion flag
player_moving = 0;
// test direction of motion, this is a good example of testing the keyboard
// although the code could be optimized this is more educational
if (keyboard_state[DIK_RIGHT] && keyboard_state[DIK_UP])
{
// move skelaton
skelaton.x+=2;
skelaton.y-=2;
dx=2; dy=-2;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_NEAST)
Set_Animation_BOB(&skelaton,SKELATON_NEAST);
} // end if
else
if (keyboard_state[DIK_LEFT] && keyboard_state[DIK_UP])
{
// move skelaton
skelaton.x-=2;
skelaton.y-=2;
dx=-2; dy=-2;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_NWEST)
Set_Animation_BOB(&skelaton,SKELATON_NWEST);
} // end if
else
if (keyboard_state[DIK_LEFT] && keyboard_state[DIK_DOWN])
{
// move skelaton
skelaton.x-=2;
skelaton.y+=2;
dx=-2; dy=2;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_SWEST)
Set_Animation_BOB(&skelaton,SKELATON_SWEST);
} // end if
else
if (keyboard_state[DIK_RIGHT] && keyboard_state[DIK_DOWN])
{
// move skelaton
skelaton.x+=2;
skelaton.y+=2;
dx=2; dy=2;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_SEAST)
Set_Animation_BOB(&skelaton,SKELATON_SEAST);
} // end if
else
if (keyboard_state[DIK_RIGHT])
{
// move skelaton
skelaton.x+=2;
dx=2; dy=0;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_EAST)
Set_Animation_BOB(&skelaton,SKELATON_EAST);
} // end if
else
if (keyboard_state[DIK_LEFT])
{
// move skelaton
skelaton.x-=2;
dx=-2; dy=0;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_WEST)
Set_Animation_BOB(&skelaton,SKELATON_WEST);
} // end if
else
if (keyboard_state[DIK_UP])
{
// move skelaton
skelaton.y-=2;
dx=0; dy=-2;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_NORTH)
Set_Animation_BOB(&skelaton,SKELATON_NORTH);
} // end if
else
if (keyboard_state[DIK_DOWN])
{
// move skelaton
skelaton.y+=2;
dx=0; dy=+2;
// set motion flag
player_moving = 1;
// check animation needs to change
if (skelaton.curr_animation != SKELATON_SOUTH)
Set_Animation_BOB(&skelaton,SKELATON_SOUTH);
} // end if
// only animate if player is moving
if (player_moving)
{
// animate skelaton
Animate_BOB(&skelaton);
// see if skelaton hit a wall
// lock surface, so we can scan it
DDraw_Lock_Back_Surface();
// call the color scanner with WALL_COLOR the color of the walls
// try to center the scan on the feet of the player
// note since we are uin 16-bit mode, we need to scan the 16 bit value then compare
// it against the 16-bit color code for the green pixel which has values RB(41,231,41)
// but depending if this is a 5.5.5 or 5.6.5 the 16-bit value will be different, however
// during ddraw_init RGB16Bit() was vectored (function pointer) to either 5.5.5 or 5.6.5
// depending on the actual surface mode, so it should all work out :)
if (Color_Scan16(skelaton.x+16, skelaton.y+16,
skelaton.x+skelaton.width-16, skelaton.y+skelaton.height-16,
RGB16Bit(WALL_COLOR_R, WALL_COLOR_G, WALL_COLOR_B),
RGB16Bit(WALL_COLOR_R, WALL_COLOR_G, WALL_COLOR_B), back_buffer,back_lpitch))
{
// back the skelaton up along its last trajectory
skelaton.x-=dx;
skelaton.y-=dy;
} // end if
// done, so unlock
DDraw_Unlock_Back_Surface();
// check if skelaton is off screen
if (skelaton.x < 0 || skelaton.x > (screen_width - skelaton.width))
skelaton.x-=dx;
if (skelaton.y < 0 || skelaton.y > (screen_height - skelaton.height))
skelaton.y-=dy;
} // end if
// draw the skelaton
Draw_BOB16(&skelaton, lpddsback);
// draw some text
Draw_Text_GDI("I STILL HAVE A BONE TO PICK!",0,screen_height - 32,RGB(32,32,32),lpddsback);
Draw_Text_GDI("(16-Bit Version) USE ARROW KEYS TO MOVE, <ESC> TO EXIT.",0,0,RGB(32,32,32),lpddsback);
// flip the surfaces
DDraw_Flip();
// sync to 30 fps
Wait_Clock(30);
// return success
return(1);
} // end Game_Main