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only render 1 sample per event loop

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This commit is contained in:
Fabien Freling 2021-04-27 09:05:46 +02:00
parent 80fed125b4
commit a3df9a7707
1 changed files with 29 additions and 29 deletions
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58
in_one_weekend/src/main.zig
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@ -128,43 +128,43 @@ pub fn main() anyerror!void {
}
}
// Render
{
while (k < samplesPerPixel) {
_ = sdl.c.SDL_LockSurface(surface);
if (k < samplesPerPixel) {
var j: usize = 0;
while (j < imageHeight) {
var i: usize = 0;
while (i < imageWidth) {
var imageIndex = i + j * imageWidth;
var pixelColor = &pixelAccu[imageIndex];
// Render
_ = sdl.c.SDL_LockSurface(surface);
const u = (@intToFloat(f32, i) + prng.random.float(f32)) / @intToFloat(f32, (imageWidth - 1));
const v = (@intToFloat(f32, j) + prng.random.float(f32)) / @intToFloat(f32, (imageHeight - 1));
const r = camera.getRay(u, v);
const sample = rayColor(r, world);
pixelColor.* = pixelColor.*.add(sample);
var j: usize = 0;
while (j < imageHeight) {
var i: usize = 0;
while (i < imageWidth) {
var imageIndex = i + j * imageWidth;
var pixelColor = &pixelAccu[imageIndex];
const averageColor = color.averageColor(pixelColor, @intCast(i32, k));
// SDL coordinate system is flipped compared to the raytracer
sdl.setSurfacePixel(surface, i, imageHeight - 1 - j, averageColor);
const u = (@intToFloat(f32, i) + prng.random.float(f32)) / @intToFloat(f32, (imageWidth - 1));
const v = (@intToFloat(f32, j) + prng.random.float(f32)) / @intToFloat(f32, (imageHeight - 1));
const r = camera.getRay(u, v);
const sample = rayColor(r, world);
pixelColor.* = pixelColor.*.add(sample);
i += 1;
}
j += 1;
const averageColor = color.averageColor(pixelColor, @intCast(i32, k));
// SDL coordinate system is flipped compared to the raytracer
sdl.setSurfacePixel(surface, i, imageHeight - 1 - j, averageColor);
i += 1;
}
setProgress(surface, imageWidth, imageHeight, @intToFloat(f32, k + 1) / @intToFloat(f32, samplesPerPixel));
sdl.c.SDL_UnlockSurface(surface);
_ = sdl.c.SDL_UpdateWindowSurface(window);
k += 1;
j += 1;
}
}
if (k >= samplesPerPixel) {
setProgress(surface, imageWidth, imageHeight, @intToFloat(f32, k + 1) / @intToFloat(f32, samplesPerPixel));
sdl.c.SDL_UnlockSurface(surface);
_ = sdl.c.SDL_UpdateWindowSurface(window);
k += 1;
} else {
sdl.c.SDL_Delay(1000 / fps);
}
}
}