AMesaBuffer GLAPIENTRY AMesaCreateBuffer(AMesaVisual visual, BITMAP* bmp)
{
AMesaBuffer buffer;
/* Buffer and visual must share the same color depth */
if (bitmap_color_depth(bmp) != visual->Depth)
return NULL;
buffer = (AMesaBuffer) malloc(sizeof(struct amesa_buffer));
if (!buffer)
return NULL;
buffer->FrontBuffer = bmp;
buffer->BackBuffer = NULL;
buffer->Active = NULL;
buffer->ReadActive = NULL;
buffer->DepthBuffer = NULL;
if (visual->DBFlag) {
buffer->BackBuffer = create_bitmap_ex(visual->Depth, bmp->w, bmp->h);
if (!buffer->BackBuffer) {
free(buffer);
return NULL;
}
}
if (visual->GLVisual->depthBits > 0) {
buffer->DepthBuffer = create_zbuffer(bmp);
if (!buffer->DepthBuffer) {
if (buffer->BackBuffer)
destroy_bitmap(buffer->BackBuffer);
free(buffer);
return NULL;
}
set_zbuffer(buffer->DepthBuffer);
}
buffer->GLBuffer = _mesa_create_framebuffer(visual->GLVisual,
0, /*depth buffer is handled by Allegro */
visual->GLVisual->stencilBits > 0, /*software stencil buffer*/
visual->GLVisual->accumRedBits > 0,/*software accum buffer*/
GL_FALSE ); /*software alpha buffer*/
if (!buffer->GLBuffer) {
if (buffer->BackBuffer)
destroy_bitmap(buffer->BackBuffer);
if (buffer->DepthBuffer)
destroy_zbuffer(buffer->DepthBuffer);
free(buffer);
return NULL;
}
buffer->Width = bmp->w;
buffer->Height = bmp->h;
return buffer;
}
void GLAPIENTRY AMesaDestroyBuffer(AMesaBuffer buffer)
{
if (buffer->BackBuffer)
destroy_bitmap(buffer->BackBuffer);
if (buffer->DepthBuffer)
destroy_zbuffer(buffer->DepthBuffer);
_mesa_destroy_framebuffer(buffer->GLBuffer);
free(buffer);
}
void view3d(MAPGEN &mapgen, float hflat, float lflat){
lc=0;
MAP map(mapgen,hflat,lflat);
BITMAP *buffer=create_bitmap(480,320);
ZBUFFER *zbuf=create_zbuffer(buffer);
set_zbuffer(zbuf);
MATRIX_f roller,camera;
// create_scene(4*(mapgen.size()*mapgen.size()), (mapgen.size()*mapgen.size()));
set_projection_viewport(0, 0, buffer->w, buffer->h);
float xfront, yfront, zfront;
float xup, yup, zup;
float heading=0,pitch=0,roll=0;
int fov=32;
float x=128,y=128,z=128;
float xs=0,ys=0,zs=0;
int fps=0,frames[101];
for(int i=0;i<101;i++)
frames[i]=0;
int mx,my,tc;
//To get rid of that annoying roll I reset mickeys.
get_mouse_mickeys(&mx,&my);
while(!(mouse_b || key[KEY_ESC])){
tc=lc;
lc=0;
while(!mouse_b && tc){
tc--;
fps-=frames[100];
for(int i=100;i>0;i--)
frames[i]=frames[i-1];
frames[0]=0;
fps+=frames[1];
/* if(key[KEY_Q])
y++;
if(key[KEY_Z])
y--;
if(key[KEY_W]){
x+=sin(heading);
z+=cos(heading);
}
if(key[KEY_S]){
x-=sin(heading);
z-=cos(heading);
}
if(key[KEY_A]){
x+=sin(heading+M_PI/2);
z+=cos(heading+M_PI/2);
}
if(key[KEY_D]){
x-=sin(heading+M_PI/2);
z-=cos(heading+M_PI/2);
}
*/
if(key[KEY_Q])
ys++;
if(key[KEY_Z])
ys--;
if(key[KEY_W]){
xs+=sin(heading);
zs+=cos(heading);
}
if(key[KEY_S]){
xs-=sin(heading);
zs-=cos(heading);
}
if(key[KEY_A]){
xs+=sin(heading+M_PI/2);
zs+=cos(heading+M_PI/2);
roll+=.02;
}
if(key[KEY_D]){
xs-=sin(heading+M_PI/2);
zs-=cos(heading+M_PI/2);
roll-=.02;
}
xs*=.99;
ys*=.9;
zs*=.99;
x+=xs;
y+=ys;
z+=zs;
get_mouse_mickeys(&mx,&my);
position_mouse(SCREEN_W/2,SCREEN_H/2);
heading-=mx/100.;
pitch-=my/100.;
if(pitch>M_PI/3) pitch=M_PI/3;
if(pitch<-M_PI/3) pitch=-M_PI/3;
roll-=mx/100.;
roll*=.95;
/* if(x>=0 && z>=0 && x/tilesize<mapgen.size() && z/tilesize<mapgen.size())
y=200+mapgen.heightmap()[int(x/tilesize)][int(z/tilesize)]*tilesize;
*/ }
/* calculate the in-front vector */
xfront = sin(heading) * cos(pitch);
yfront = sin(pitch);
zfront = cos(heading) * cos(pitch);
/* rotate the up vector around the in-front vector by the roll angle */
get_vector_rotation_matrix_f(&roller, xfront, yfront, zfront, roll*128.0/M_PI);
apply_matrix_f(&roller, 0, 1, 0, &xup, &yup, &zup);
/* build the camera matrix */
get_camera_matrix_f(&camera, x, y, z, xfront, yfront, zfront, xup, yup, zup, fov, 1);
polys_drawn=0;
clear_bitmap(buffer);
// clear_scene(buffer);
clear_zbuffer(zbuf,0);
map.render(buffer,&camera,int(x),int(y));
// render_scene();
textprintf_ex(buffer,font,8,8,-1,-1,"FPS: %i",fps);
textprintf_ex(buffer,font,8,16,-1,-1,"Polygon count: %i",polys_drawn);
blit(buffer, screen, 0, 0, 280, 8, buffer->w, buffer->h);
frames[0]++;
}
destroy_bitmap(buffer);
destroy_zbuffer(zbuf);
// destroy_scene();
while(mouse_b || key[KEY_ESC]);
clear_keybuf();
}
