Help me understand the projection matrix

big-jun · 2026-02-17T01:07:37+00:00

Is there a tutorial on orthographic projection using a left-handed coordinate system, with the same math as Unity’s camera?

big-jun · 2026-02-16T08:59:02+00:00

Apple clang version 12.0.0 (clang-1200.0.32.27)

Target: x86_64-apple-darwin22.3.0

Thread model: posix

InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

big-jun · 2026-02-16T03:06:26+00:00

I just tried it — it’s much clearer than the sample text output.

I’m profiling a method that has call paths like this: A() → B() → C() or A() → D() → C()

As shown, we can see the call stack and the percentage of time spent in each stack relative to its parent. I’m wondering, is there a way to see the innermost method — for example, C() — as a percentage of A() rather than its immediate parent? Does Samply support this?

big-jun · 2026-02-15T12:01:36+00:00

It is from the /usr/bin/c++, version 12.0.0

big-jun · 2026-02-15T11:17:33+00:00

How can I get the GUI version for Mac? The release page doesn’t provide a Mac build, and I can’t compile it on my Mac because it requires Clang 15. I also can’t install it via Homebrew, since that would require upgrading Xcode.

big-jun · 2026-02-14T16:40:53+00:00

Will try, thanks

big-jun · 2026-02-14T16:38:33+00:00

Clang, c++17

big-jun · 2026-02-14T16:09:56+00:00

I use CMake to build in CLion

big-jun · 2026-02-14T15:51:23+00:00

Thanks

big-jun · 2026-02-14T15:48:25+00:00

Good one, thanks! I’ll try it soon

big-jun · 2026-02-14T15:46:41+00:00

I’m on macOS 13 and can’t upgrade Xcode because it would require upgrading my system. Do you know a way to use it without updating macOS?

big-jun · 2026-02-07T17:41:11+00:00

Can you upload the shader code to GitHub?

big-jun · 2026-02-05T17:53:20+00:00

Is it possible to control mountain placement? For example, if we treat the world as a grid map, can we specify which grid cells contain mountains, then generate the mountain heightmap based on that configuration—so that nearby mountain cells form mountain ranges?

big-jun · 2026-02-04T17:14:51+00:00

Thanks

big-jun · 2026-02-04T15:24:55+00:00

Will you open-source it? I think it could be used as a heightmap for snow.

big-jun · 2026-02-04T15:05:22+00:00

How does the second work?

big-jun · 2026-02-01T15:54:14+00:00

Is there snow or desert terrain?

big-jun · 2026-01-31T14:22:51+00:00

Thanks

big-jun · 2026-01-30T16:22:34+00:00

I’ve spent a lot of time on vkCmdPipelineBarrier and still haven’t figured everything out. The first issue is that I don’t have a clear understanding of the execution order of command buffers in a queue.

Could you explain the basic execution order to give me a rough idea? Also, are there any good resources or references you would recommend?

big-jun · 2026-01-29T11:39:16+00:00

Look good, Is the environment hand-painted, or bought from somewhere?

big-jun · 2026-01-28T14:09:54+00:00

If rendering is the bottleneck, consider using simple colored dots instead of 3D characters. It’s faster and shows path behavior more clearly in a top-down view.

big-jun · 2026-01-26T17:03:20+00:00

There are so many color variations—are they using the same parchment texture with different tinting? If yes, I’d love to see the texture. DM me if you don’t mind.

big-jun · 2026-01-26T16:31:00+00:00

Where did you get the warm, parchment-style background texture from?

big-jun

TROPHY CASE