neop/randomwalk
neop/randomwalk
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This commit is contained in:
Jakob Hördt 2024-08-05 10:55:36 +02:00
parent d7c7d773ab
commit 78471c21f0
2 changed files with 16 additions and 4 deletions
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20
main.cpp
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@ -113,6 +113,7 @@ int main() try {
sdl_check(SDL_RenderClear(renderer));
SDL_Point pos{.x = width / 2, .y = height / 2};
SDL_Point pos1{.x = width / 2, .y = height / 2};
constexpr SDL_Point directions[] = {
{.x = -1, .y = 0}, {.x = 1, .y = 0}, {.x = 0, .y = -1}, {.x = 0, .y = 1}
};
@ -160,14 +161,25 @@ int main() try {
SDL_BLENDFACTOR_ONE, SDL_BLENDOPERATION_ADD
)
));
sdl_check(
SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE)
);
sdl_check(SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 32));
sdl_check(SDL_RenderDrawPoints(
renderer, point_batch.data(), point_batch.size()
));
for (auto step = 0z; step < batchsize; ++step) {
SDL_Point newpoint;
do {
newpoint = pos1 + directions[dist(rne)];
} while (newpoint.x < 0 or newpoint.x >= width or newpoint.y < 0 or
newpoint.y >= height);
pos1 = newpoint;
point_batch[step] = newpoint;
}
sdl_check(SDL_SetRenderDrawColor(renderer, 0xff, 0xff, 0xff, 32));
sdl_check(SDL_RenderFillRect(renderer, nullptr));
sdl_check(SDL_RenderDrawPoints(
renderer, point_batch.data(), point_batch.size()
));
// sdl_check(SDL_SetRenderDrawColor(renderer, 0xff, 0xff, 0xff, 32));
// sdl_check(SDL_RenderFillRect(renderer, nullptr));
// SDL_RenderCopy(renderer, fade_texture, nullptr, nullptr);
///// Render screen

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