info/tinyraycaster
1
0
Fork 0
mirror of https://github.com/ssloy/tinyraycaster.git synced 2025-08-16 19:14:07 +02:00
Code Issues Releases Wiki Activity

rudimentary usage of the textures

Browse Source
This commit is contained in:
Dmitry V. Sokolov
2019-02-09 16:53:45 +01:00
parent f84ae5aac9
commit df8fb12a3e
2 changed files with 9 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

BIN
doc/010.png Normal file
View File

Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 3.5 KiB

31
tinyraycaster.cpp
View File

@@ -94,9 +94,9 @@ int main() {
"0 0 1110000"\ "0 0 1110000"\
"0 3 0"\ "0 3 0"\
"0 10000 0"\ "0 10000 0"\
"0 0 11100 0"\ "0 3 11100 0"\
"0 0 0 0"\ "5 4 0 0"\
"0 0 1 00000"\ "5 4 1 00000"\
"0 1 0"\ "0 1 0"\
"2 1 0"\ "2 1 0"\
"0 0 0"\ "0 0 0"\
@@ -109,12 +109,6 @@ int main() {
float player_a = 1.523; // player view direction float player_a = 1.523; // player view direction
const float fov = M_PI/3.; // field of view const float fov = M_PI/3.; // field of view
const size_t ncolors = 10;
std::vector<uint32_t> colors(ncolors);
for (size_t i=0; i<ncolors; i++) {
colors[i] = pack_color(rand()%255, rand()%255, rand()%255);
}
std::vector<uint32_t> walltext; // textures for the walls std::vector<uint32_t> walltext; // textures for the walls
size_t walltext_size; // texture dimensions (it is a square) size_t walltext_size; // texture dimensions (it is a square)
size_t walltext_cnt; // number of different textures in the image size_t walltext_cnt; // number of different textures in the image
@@ -130,9 +124,9 @@ int main() {
if (map[i+j*map_w]==' ') continue; // skip empty spaces if (map[i+j*map_w]==' ') continue; // skip empty spaces
size_t rect_x = i*rect_w; size_t rect_x = i*rect_w;
size_t rect_y = j*rect_h; size_t rect_y = j*rect_h;
size_t icolor = map[i+j*map_w] - '0'; size_t texid = map[i+j*map_w] - '0';
assert(icolor<ncolors); assert(texid<walltext_cnt);
draw_rectangle(framebuffer, win_w, win_h, rect_x, rect_y, rect_w, rect_h, colors[icolor]); draw_rectangle(framebuffer, win_w, win_h, rect_x, rect_y, rect_w, rect_h, walltext[texid*walltext_size]); // the color is taken from the upper left pixel of the texture #texid
} }
} }
@@ -147,22 +141,15 @@ int main() {
framebuffer[pix_x + pix_y*win_w] = pack_color(160, 160, 160); // this draws the visibility cone framebuffer[pix_x + pix_y*win_w] = pack_color(160, 160, 160); // this draws the visibility cone
if (map[int(cx)+int(cy)*map_w]!=' ') { // our ray touches a wall, so draw the vertical column to create an illusion of 3D if (map[int(cx)+int(cy)*map_w]!=' ') { // our ray touches a wall, so draw the vertical column to create an illusion of 3D
size_t icolor = map[int(cx)+int(cy)*map_w] - '0'; size_t texid = map[int(cx)+int(cy)*map_w] - '0';
assert(icolor<ncolors); assert(texid<walltext_cnt);
size_t column_height = win_h/(t*cos(angle-player_a)); size_t column_height = win_h/(t*cos(angle-player_a));
draw_rectangle(framebuffer, win_w, win_h, win_w/2+i, win_h/2-column_height/2, 1, column_height, colors[icolor]); draw_rectangle(framebuffer, win_w, win_h, win_w/2+i, win_h/2-column_height/2, 1, column_height, walltext[texid*walltext_size]);
break; break;
} }
} }
} }
const size_t texid = 4; // draw the 4th texture on the screen
for (size_t i=0; i<walltext_size; i++) {
for (size_t j=0; j<walltext_size; j++) {
framebuffer[i+j*win_w] = walltext[i + texid*walltext_size + j*walltext_size*walltext_cnt];
}
}
drop_ppm_image("./out.ppm", framebuffer, win_w, win_h); drop_ppm_image("./out.ppm", framebuffer, win_w, win_h);
return 0; return 0;