#emscripten stuck at download

27 messages · Page 1 of 1 (latest)

tame pilot
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Hi I have a problem I made a program printing a fractal but it gets stuck when opening the html file and it does nothing i can't even use inspect on it I'm using the latest version of emscripten and SDL3

hoary pantherBOT
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tame pilot
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#include <SDL3/SDL.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <iostream>
#define M_PI 3.14159265358979323846 // pi
#define WINDOW_W 800
#define WINDOW_H 600

void draw_fractal(SDL_Renderer* r,
float x, float y,
float length,
float angle,
int depth,
int maxDepth,
float angleLeft,
float angleRight)
{
if (depth >= maxDepth || length < 1.0f)
return;

float x2 = x + cosf(angle) * length;
float y2 = y - sinf(angle) * length;

SDL_RenderLine(r, (int)x, (int)y, (int)x2, (int)y2);


draw_fractal(r, x2, y2, length * 0.75f, angle + angleLeft,
    depth + 1, maxDepth, angleLeft, angleRight);

draw_fractal(r, x2, y2, length * 0.75f, angle - angleRight,
    depth + 1, maxDepth, angleLeft, angleRight);

}

int main(int argc, char** argv)
{
Uint64 itteracje,multi = 5;
Uint16 key = 1;

SDL_Init(SDL_INIT_VIDEO);

SDL_Window* win = SDL_CreateWindow("Fraktal", WINDOW_W, WINDOW_H, 0);
SDL_Renderer* ren = SDL_CreateRenderer(win, NULL);

srand((unsigned)time(NULL));

switch (key) 
{
case 1:
    key = 90;
    break;
case 2:
    key = 35;
    break;
case 3:
    key = 360;
    break;
}


float angleLeft = (rand() % key
    + 10) * M_PI / 180.0f; 
float angleRight = (rand() % key
    + 10) * M_PI / 180.0f;

int run = 1;
SDL_Event evt;

while (run) {
    while (SDL_PollEvent(&evt)) {
        if (evt.type == SDL_EVENT_QUIT)
            run = 0;
    }
   
    SDL_SetRenderDrawColor(ren, 0, 0, 0, 255);
    SDL_RenderClear(ren);

    SDL_SetRenderDrawColor(ren, 255, 255, 255,
#

255);

    draw_fractal(ren,
        WINDOW_W / 2, WINDOW_H - 20,  
        120,                          
        M_PI / 2,                      
        0,
        (itteracje * multi),                           
        angleLeft, angleRight);


    SDL_RenderPresent(ren);

}

SDL_DestroyRenderer(ren);
SDL_DestroyWindow(win);
SDL_Quit();
return 0;

}

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255);

    draw_fractal(ren,
        WINDOW_W / 2, WINDOW_H - 20,  
        120,                          
        M_PI / 2,                      
        0,
        (itteracje * multi),                           
        angleLeft, angleRight);


    SDL_RenderPresent(ren);

}

SDL_DestroyRenderer(ren);
SDL_DestroyWindow(win);
SDL_Quit();
return 0;

}

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and here is the http

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expected return is a fractal drawn using line primitives

torn cradle
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Where do you click inspect?

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Try right-clicking an empty space instead of the black rect

tame pilot
tame pilot
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alr i so i think i get it

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it must be my code

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bc the site decided to load in

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so that's not html

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welp

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OOOH

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I think i know

torn cradle
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Ah I should've looked at the code before saying anything. Emscripten has special requirements regarding the main loop

tame pilot
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I'll use callback

torn cradle
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Yep 🙂

tame pilot
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dumb me

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it finally works

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!solved