altagos.dev
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getting started with materials
+84
-11
+5
src/camera.zig
+5
src/camera.zig
···
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image_width: usize,
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aspect_ratio: f32,
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samples_per_pixel: usize,
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+
max_depth: usize,
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};
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image_height: usize,
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image_width: usize,
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aspect_ratio: f32,
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+
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samples_per_pixel: usize,
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max_depth: usize,
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focal_lenght: f32,
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viewport_height: f32,
···
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.image_width = image_width,
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.image_height = image_height,
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.aspect_ratio = aspect_ratio,
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.samples_per_pixel = opts.samples_per_pixel,
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.max_depth = opts.max_depth,
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.focal_lenght = focal_lenght,
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.viewport_height = viewport_height,
+6
-1
src/main.zig
+6
-1
src/main.zig
···
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const s = spall.trace(@src(), "Raytracer", .{});
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// Raytracing part
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var raytracer = try rayray.Raytracer.init(allocator, world, .{ .aspect_ratio = 16.0 / 9.0, .image_width = 400, .samples_per_pixel = 100 });
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var raytracer = try rayray.Raytracer.init(allocator, world, .{
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.aspect_ratio = 16.0 / 9.0,
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.image_width = 400,
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.samples_per_pixel = 100,
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.max_depth = 50,
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});
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defer raytracer.deinit();
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const img = try raytracer.render();
+1
src/rayray.zig
+1
src/rayray.zig
+15
-10
src/renderer.zig
+15
-10
src/renderer.zig
···
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4
const zigimg = @import("zigimg");
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const zm = @import("zmath");
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-
pub const Camera = @import("camera.zig");
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pub const hittable = @import("hittable.zig");
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pub const Ray = @import("ray.zig");
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const Camera = @import("camera.zig");
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const hittable = @import("hittable.zig");
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const Ray = @import("ray.zig");
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const util = @import("util.zig");
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pub const interval = @import("interval.zig");
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pub const IntervalUsize = interval.IntervalUsize;
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pub const IntervalF32 = interval.IntervalF32;
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const interval = @import("interval.zig");
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const IntervalUsize = interval.IntervalUsize;
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const IntervalF32 = interval.IntervalF32;
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const log = std.log.scoped(.renderer);
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···
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world: *hittable.HittableList,
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};
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pub fn rayColor(r: *Ray, world: *hittable.HittableList) zm.Vec {
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if (world.hit(r, IntervalF32.init(0, std.math.inf(f32)))) |rec| {
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return zm.f32x4(0.5, 0.5, 0.5, 1.0) * (rec.normal + zm.f32x4(1, 1, 1, 1));
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pub fn rayColor(r: *Ray, world: *hittable.HittableList, depth: usize) zm.Vec {
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if (depth <= 0) return zm.f32x4(0, 0, 0, 1.0);
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+
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if (world.hit(r, IntervalF32.init(0.001, std.math.inf(f32)))) |rec| {
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r.orig = rec.p;
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r.dir = util.randomOnHemisphere(rec.normal);
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return zm.f32x4(0.5, 0.5, 0.5, 1.0) * rayColor(r, world, depth - 1);
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}
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const unit_direction = zm.normalize3(r.dir);
···
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var col = zm.f32x4(0.0, 0.0, 0.0, 1.0);
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for (0..ctx.cam.samples_per_pixel) |_| {
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var ray = ctx.cam.getRay(i, j);
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col += rayColor(&ray, ctx.world);
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col += rayColor(&ray, ctx.world, ctx.cam.max_depth);
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}
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ctx.cam.setPixel(i, j, vecToRgba(col, ctx.cam.samples_per_pixel)) catch break;
+57
src/util.zig
+57
src/util.zig
···
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const std = @import("std");
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const random = std.crypto.random;
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const zm = @import("zmath");
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/// Returns a random real in [0,1).
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pub inline fn randomF32() f32 {
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return random.float(f32);
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}
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/// Returns a random real in [min,max).
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pub inline fn randomF32M(min: f32, max: f32) f32 {
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return min + (max - min) * randomF32();
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}
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pub inline fn randomVec2() zm.Vec {
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return zm.f32x4(randomF32, randomF32, 0, 0);
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}
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pub inline fn randomVec3() zm.Vec {
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return zm.f32x4(randomF32, randomF32, randomF32, 0);
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}
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pub inline fn randomVec() zm.Vec {
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return zm.f32x4(randomF32, randomF32, randomF32, randomF32);
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}
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pub inline fn randomVec2M(min: f32, max: f32) zm.Vec {
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return zm.f32x4(randomF32M(min, max), randomF32M(min, max), 0, 0);
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}
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pub inline fn randomVec3M(min: f32, max: f32) zm.Vec {
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return zm.f32x4(randomF32M(min, max), randomF32M(min, max), randomF32M(min, max), 0);
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}
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pub inline fn randomVecM(min: f32, max: f32) zm.Vec {
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return zm.f32x4(randomF32M(min, max), randomF32M(min, max), randomF32M(min, max), randomF32M(min, max));
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}
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pub inline fn randomInUnitSphere() zm.Vec {
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while (true) {
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const p = randomVec3M(-1.0, 1.0);
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if (zm.lengthSq3(p)[0] < 1.0) return p;
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}
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}
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pub inline fn randomUnitVec() zm.Vec {
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return zm.normalize3(randomInUnitSphere());
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}
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+
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pub inline fn randomOnHemisphere(normal: zm.Vec) zm.Vec {
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const on_unit_sphere = randomUnitVec();
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return if (zm.dot3(on_unit_sphere, normal)[0] > 0.0) // In the same hemisphere as the normal
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on_unit_sphere
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else
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-on_unit_sphere;
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}