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
// these are used to create a circling camera
static float view_angle = 0;
static float camera_distance = 6000;
static VECTOR4D pos = {0,0,0,0};
static float tank_speed;
static float turning = 0;
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/2, RGB16Bit(0,140,192), lpddsback);
// draw the ground
Draw_Rectangle(0,WINDOW_HEIGHT/2, WINDOW_WIDTH-1, WINDOW_HEIGHT-1, RGB16Bit(103,62,3), lpddsback);
// read keyboard and other devices here
DInput_Read_Keyboard();
// game logic here...
// reset the render list
Reset_RENDERLIST4DV1(&rend_list);
// allow user to move camera
// turbo
if (keyboard_state[DIK_SPACE])
tank_speed = 5*TANK_SPEED;
else
tank_speed = TANK_SPEED;
// forward/backward
if (keyboard_state[DIK_UP])
{
// move forward
cam.pos.x += tank_speed*Fast_Sin(cam.dir.y);
cam.pos.z += tank_speed*Fast_Cos(cam.dir.y);
} // end if
if (keyboard_state[DIK_DOWN])
{
// move backward
cam.pos.x -= tank_speed*Fast_Sin(cam.dir.y);
cam.pos.z -= tank_speed*Fast_Cos(cam.dir.y);
} // end if
// rotate
if (keyboard_state[DIK_RIGHT])
{
cam.dir.y+=3;
// add a little turn to object
if ((turning+=2) > 15)
turning=15;
} // end if
if (keyboard_state[DIK_LEFT])
{
cam.dir.y-=3;
// add a little turn to object
if ((turning-=2) < -15)
turning=-15;
} // end if
else // center heading again
{
if (turning > 0)
turning-=1;
else
if (turning < 0)
turning+=1;
} // end else
// generate camera matrix
Build_CAM4DV1_Matrix_Euler(&cam, CAM_ROT_SEQ_ZYX);
// insert the tanks in the world
for (index = 0; index < NUM_TANKS; index++)
{
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_tank);
// generate rotation matrix around y axis
Build_XYZ_Rotation_MATRIX4X4(0, tanks[index].w, 0, &mrot);
// rotate the local coords of the object
Transform_OBJECT4DV1(&obj_tank, &mrot, TRANSFORM_LOCAL_TO_TRANS,1);
// set position of tank
obj_tank.world_pos.x = tanks[index].x;
obj_tank.world_pos.y = tanks[index].y;
obj_tank.world_pos.z = tanks[index].z;
// attempt to cull object
if (!Cull_OBJECT4DV1(&obj_tank, &cam, CULL_OBJECT_XYZ_PLANES))
{
// if we get here then the object is visible at this world position
// so we can insert it into the rendering list
// perform local/model to world transform
Model_To_World_OBJECT4DV1(&obj_tank, TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_tank);
} // end if
} // end for
// insert the player into the world
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_player);
// set position of tank
obj_player.world_pos.x = cam.pos.x+300*Fast_Sin(cam.dir.y);
obj_player.world_pos.y = cam.pos.y-70;
obj_player.world_pos.z = cam.pos.z+300*Fast_Cos(cam.dir.y);
// generate rotation matrix around y axis
Build_XYZ_Rotation_MATRIX4X4(0, cam.dir.y+turning, 0, &mrot);
// rotate the local coords of the object
Transform_OBJECT4DV1(&obj_player, &mrot, TRANSFORM_LOCAL_TO_TRANS,1);
// perform world transform
Model_To_World_OBJECT4DV1(&obj_player, TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_player);
// insert the towers in the world
for (index = 0; index < NUM_TOWERS; index++)
{
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_tower);
// set position of tower
obj_tower.world_pos.x = towers[index].x;
obj_tower.world_pos.y = towers[index].y;
obj_tower.world_pos.z = towers[index].z;
// attempt to cull object
if (!Cull_OBJECT4DV1(&obj_tower, &cam, CULL_OBJECT_XYZ_PLANES))
{
// if we get here then the object is visible at this world position
// so we can insert it into the rendering list
// perform local/model to world transform
Model_To_World_OBJECT4DV1(&obj_tower);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_tower);
} // end if
} // end for
// seed number generator so that modulation of markers is always the same
srand(13);
// insert the ground markers into the world
for (int index_x = 0; index_x < NUM_POINTS_X; index_x++)
for (int index_z = 0; index_z < NUM_POINTS_Z; index_z++)
{
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_marker);
// set position of tower
obj_marker.world_pos.x = RAND_RANGE(-100,100)-UNIVERSE_RADIUS+index_x*POINT_SIZE;
obj_marker.world_pos.y = obj_marker.max_radius;
obj_marker.world_pos.z = RAND_RANGE(-100,100)-UNIVERSE_RADIUS+index_z*POINT_SIZE;
// attempt to cull object
if (!Cull_OBJECT4DV1(&obj_marker, &cam, CULL_OBJECT_XYZ_PLANES))
{
// if we get here then the object is visible at this world position
// so we can insert it into the rendering list
// perform local/model to world transform
Model_To_World_OBJECT4DV1(&obj_marker);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_marker);
} // end if
} // end for
// remove backfaces
Remove_Backfaces_RENDERLIST4DV1(&rend_list, &cam);
// apply world to camera transform
World_To_Camera_RENDERLIST4DV1(&rend_list, &cam);
// apply camera to perspective transformation
Camera_To_Perspective_RENDERLIST4DV1(&rend_list, &cam);
// apply screen transform
Perspective_To_Screen_RENDERLIST4DV1(&rend_list, &cam);
sprintf(work_string,"pos:[%f, %f, %f] heading:[%f] elev:[%f]",
cam.pos.x, cam.pos.y, cam.pos.z, cam.dir.y, cam.dir.x);
Draw_Text_GDI(work_string, 0, WINDOW_HEIGHT-20, RGB(0,255,0), lpddsback);
// draw instructions
Draw_Text_GDI("Press ESC to exit. Press Arrow Keys to Move. Space for TURBO.", 0, 0, RGB(0,255,0), lpddsback);
// lock the back buffer
DDraw_Lock_Back_Surface();
// render the object
Draw_RENDERLIST4DV1_Wire16(&rend_list, back_buffer, back_lpitch);
// unlock the back buffer
DDraw_Unlock_Back_Surface();
// flip the surfaces
DDraw_Flip();
// 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
static void display(void)
{
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
static float view_angle = 0;
static float camera_distance = 6000;
static VECTOR4D pos = { 0, 0, 0, 0 };
static float tank_speed;
static float turning = 0;
if (keyboard_state[VK_SPACE])
tank_speed = 5 * TANK_SPEED;
else
tank_speed = TANK_SPEED;
// forward/backward
if (keyboard_state['W'] || keyboard_state['w'])
{
// move forward
cam.pos.x -= tank_speed*Fast_Sin(cam.dir.y);
cam.pos.z -= tank_speed*Fast_Cos(cam.dir.y);
} // end if
if (keyboard_state['S'] || keyboard_state['s'])
{
// move backward
cam.pos.x += tank_speed*Fast_Sin(cam.dir.y);
cam.pos.z += tank_speed*Fast_Cos(cam.dir.y);
} // end if
// rotate
if (keyboard_state['D'] || keyboard_state['d'])
{
cam.dir.y -= TANK_ROTATE_SPEED;
// add a little turn to object
if ((turning -= 2) < -15)
turning = -15;
} // end if
if (keyboard_state['a'] || keyboard_state['A'])
{
cam.dir.y += TANK_ROTATE_SPEED;
// add a little turn to object
if ((turning += 2) > 15)
turning = 15;
} // end if
else // center heading again
{
if (turning > 0)
turning -= 1;
else if (turning < 0)
turning += 1;
} // end else
//cam.dir.y += 0.05;
//if (cam.dir.y > 360)
// cam.dir.y = 0;
//Build_CAM4DV1_Matrix_Euler(&cam, CAM_ROT_SEQ_ZYX);
//Rotate_XYZ_OBJECT4DV1(&obj, 0, 1, 0);
//Model_To_World_OBJECT4DV1(&obj);
//Reset_OBJECT4DV1(&obj);
//Cull_OBJECT4DV1(&obj, &cam, CULL_OBJECT_X_PLANE | CULL_OBJECT_Y_PLANE | CULL_OBJECT_Z_PLANE);
//Remove_Backfaces_OBJECT4DV1(&obj, &cam);
//World_To_Camera_OBJECT4DV1(&obj, &cam);
//Camera_To_Perspective_Screen_OBJECT4DV1(&obj, &cam);
//memset(buffer, 0, sizeof(UINT)* WINDOW_WIDTH * WINDOW_HEIGHT);
for (int i = 0; i < g_width * g_height; ++i)
{
buffer[i] = 0;// 0xffffffff;
}
//Draw_OBJECT4DV1_Solid(&obj, (UCHAR *)buffer, WINDOW_WIDTH);
//Draw_OBJECT4DV1_Wire(&obj, (UCHAR *)buffer, WINDOW_WIDTH);
//glBindVertexArray(VAOs[VAO_1]);
//glBindBuffer(GL_ARRAY_BUFFER, Buffers[ArrayBuffer]);
//glBufferData(GL_ARRAY_BUFFER, sizeof(POINT4D)* obj.num_vertices, obj.vlist_trans, GL_DYNAMIC_DRAW);
////glDrawArrays(GL_TRIANGLES, 0, obj.num_polys);
//int polys = 0;
//for (int i = 0, j = 0; i < obj.num_polys; ++i)
//{Z
// if (!(obj.plist[i].state & POLY4DV1_STATE_ACTIVE) || (obj.plist[i].state & POLY4DV1_STATE_CLIPPED)
// || (obj.plist[i].state & POLY4DV1_STATE_BACKFACE))
// continue;
// indexBuffer[j++] = obj.plist[i].vert[0];
// indexBuffer[j++] = obj.plist[i].vert[1];
// indexBuffer[j++] = obj.plist[i].vert[2];
// ++polys;
//}
//glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint)* 3 * polys, indexBuffer, GL_STATIC_DRAW);
//glDrawElements(GL_TRIANGLES, polys * 3, GL_UNSIGNED_INT, 0);
//glFlush();
Reset_RENDERLIST4DV1(&rend_list);
static MATRIX4X4 mrot; // general rotation matrix
// generate camera matrix
Build_CAM4DV1_Matrix_Euler(&cam, CAM_ROT_SEQ_ZYX);
// insert the tanks in the world
for (int index = 0; index < NUM_TANKS; index++)
{
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_tank);
// generate rotation matrix around y axis
Build_XYZ_Rotation_MATRIX4X4(0, tanks[index].y, 0, &mrot);
// rotate the local coords of the object
Transform_OBJECT4DV1(&obj_tank, &mrot, TRANSFORM_LOCAL_TO_TRANS, 1);
// set position of tank
obj_tank.world_pos.x = tanks[index].x;
obj_tank.world_pos.y = tanks[index].y;
obj_tank.world_pos.z = tanks[index].z;
// attempt to cull object
if (!Cull_OBJECT4DV1(&obj_tank, &cam, CULL_OBJECT_XYZ_PLANES))
{
// if we get here then the object is visible at this world position
// so we can insert it into the rendering list
// perform local/model to world transform
Model_To_World_OBJECT4DV1(&obj_tank, TRANSFORM_TRANS_ONLY);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_tank);
} // end if
} // end for
// insert the player into the world
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_player);
// set position of tank
obj_player.world_pos.x = cam.pos.x - 300 * Fast_Sin(cam.dir.y);
obj_player.world_pos.y = cam.pos.y - 70;
obj_player.world_pos.z = cam.pos.z - 300 * Fast_Cos(cam.dir.y);
// generate rotation matrix around y axis
Build_XYZ_Rotation_MATRIX4X4(0, cam.dir.y + turning, 0, &mrot);
//lights[0].pos.x = 300 * Fast_Sin(cam.dir.y);
//lights[0].pos.z = 300 * Fast_Cos(cam.dir.y);
// rotate the local coords of the object
Transform_OBJECT4DV1(&obj_player, &mrot, TRANSFORM_LOCAL_TO_TRANS, 1);
// perform world transform
Model_To_World_OBJECT4DV1(&obj_player, TRANSFORM_TRANS_ONLY);
Cull_OBJECT4DV1(&obj_player, &cam, CULL_OBJECT_XYZ_PLANES);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_player);
// insert the towers in the world
for (int index = 0; index < NUM_TOWERS; index++)
{
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_tower);
// set position of tower
obj_tower.world_pos.x = towers[index].x;
obj_tower.world_pos.y = towers[index].y;
obj_tower.world_pos.z = towers[index].z;
// attempt to cull object
if (!Cull_OBJECT4DV1(&obj_tower, &cam, CULL_OBJECT_XYZ_PLANES))
{
// if we get here then the object is visible at this world position
// so we can insert it into the rendering list
// perform local/model to world transform
Model_To_World_OBJECT4DV1(&obj_tower);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_tower);
} // end if
} // end for
// seed number generator so that modulation of markers is always the same
srand(13);
// insert the ground markers into the world
for (int index_x = 0; index_x < NUM_POINTS_X; index_x++)
for (int index_z = 0; index_z < NUM_POINTS_Z; index_z++)
{
// reset the object (this only matters for backface and object removal)
Reset_OBJECT4DV1(&obj_marker);
// set position of tower
obj_marker.world_pos.x = RAND_RANGE(-100, 100) - UNIVERSE_RADIUS + index_x*POINT_SIZE;
obj_marker.world_pos.y = obj_marker.max_radius;
obj_marker.world_pos.z = RAND_RANGE(-100, 100) - UNIVERSE_RADIUS + index_z*POINT_SIZE;
// attempt to cull object
if (!Cull_OBJECT4DV1(&obj_marker, &cam, CULL_OBJECT_XYZ_PLANES))
{
// if we get here then the object is visible at this world position
// so we can insert it into the rendering list
// perform local/model to world transform
Model_To_World_OBJECT4DV1(&obj_marker);
// insert the object into render list
Insert_OBJECT4DV1_RENDERLIST4DV1(&rend_list, &obj_marker);
} // end if
} // end for
// remove backfaces
Remove_Backfaces_RENDERLIST4DV1(&rend_list, &cam);
// apply world to camera transform
World_To_Camera_RENDERLIST4DV1(&rend_list, &cam);
Sort_RENDERLIST4DV1(&rend_list, SORT_POLYLIST_NEARZ);
Light_RENDERLIST4DV1_World(&rend_list, &cam, lights, 1);
Camera_To_Perspective_Screen_RENDERLIST4DV1(&rend_list, &cam);
Draw_RENDERLIST4DV1_Wire(&rend_list, (UCHAR *)buffer, g_width);
//Draw_RENDERLIST4DV1_Solid(&rend_list, (UCHAR *)buffer, g_width);
glDrawPixels(g_width, g_height, GL_BGRA, GL_UNSIGNED_BYTE, buffer);
glutSwapBuffers();
}
