TermiNexus
976b8307f9
Drop the serial tracing from startup, the render thread and the pre-render loop.
94 lines
3.4 KiB
Plaintext
94 lines
3.4 KiB
Plaintext
import vpsdk.window as window
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import vpsdk.process as process
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import vpsdk.vpui as vpui
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import string
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from stdint import *
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import gfx
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define SCENE_W = 640
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define SCENE_H = 360
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_zbuf_mem: [SCENE_W * SCENE_H * 8]uint8 = []
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_fb_mem: [SCENE_W * SCENE_H]uint32 = []
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_root_ptr: vpui.Tk*
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_canvas_ptr: vpui.FBCanvas*
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_s3d_ptr: gfx.Scene3D*
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_time_val: float = float(0.0)
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# 渲染线程的 tid / 已退出标记：主线程必须等它退完才能 process.exit。
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# 主线程栈上有 root/canvas/s3d，渲染线程还在引用；process.exit 会立刻回收主线程用户栈，
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# 先退主线程 ⇒ 渲染线程在已解映射的栈上取数 ⇒ #PF。
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_render_tid: int = -1
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_render_done: int = 0
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# 时间回绕周期 = 4π：Render 里 time*1 / time*2 / time*1.5 的 sin/cos 参数整体平移 2π 的整数倍
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# ⇒ 动画严格连续；同时让相位半径永远很小，避免 float32 精度随运行时间退化
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# （x 变大后相邻采样点的相位差被量化 ⇒ 曲线塌成一条平线、热力图颜色失去层次）。
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define TIME_WRAP = float(12.566370614359172)
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def _render_thread(arg: rawptr):
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global _time_val, _render_done
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root: vpui.Tk* = _root_ptr
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canvas: vpui.FBCanvas* = _canvas_ptr
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s3d: gfx.Scene3D* = _s3d_ptr
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while root.winfo_exists():
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s3d.Render(_time_val)
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_time_val += float(0.02)
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if _time_val >= TIME_WRAP: _time_val = _time_val - TIME_WRAP
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root.update()
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process.yield_cpu()
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_render_done = 1
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# 窗口已被 explorer 回收：显式 THREAD_EXIT，绝不 return —— 用户线程的 return 会落到
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# 出口跳板（旧调用号 34，而 THREAD_EXIT=60）⇒ Ring3 `jmp $` 空转、全机不再调度。
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process.thread_exit()
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@__attribute__(section(".text.startup"), aligned(16))
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export def _start() -> int:
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root: vpui.Tk = vpui.Tk()
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root.title("3D Scene")
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root.set_style(window.STYLE_WIN11)
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root.bg_color = uint32(0x0F0F19)
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master: vpui.Tk* = &root
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canvas: vpui.FBCanvas = vpui.FBCanvas(master, SCENE_W, SCENE_H)
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root.pack(0, vpui.PACK_TOP, vpui.FILL_BOTH, 1, 0, 0)
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zbuf: float* = &_zbuf_mem
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string.memset(zbuf, 0, SCENE_W * SCENE_H * 8)
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fb: UINT32PTR = &_fb_mem
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string.memset(fb, 0, SCENE_W * SCENE_H * 4)
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canvas.set_fb(fb, SCENE_W, SCENE_H)
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s3d: gfx.Scene3D = gfx.Scene3D(fb, zbuf, SCENE_W, SCENE_H)
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root.geometry(100, 30, SCENE_W, SCENE_H + 32)
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global _root_ptr, _canvas_ptr, _s3d_ptr, _render_tid
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_root_ptr = &root
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_canvas_ptr = &canvas
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_s3d_ptr = &s3d
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# 主线程先直推 3 帧，再启动渲染线程。
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global _time_val
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for _pi in range(3):
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s3d.Render(_time_val)
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_time_val += float(0.02)
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root.update()
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_render_tid = process.thread_create(_render_thread, None)
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root.mainloop()
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# 窗口已关闭：先等渲染线程退出，才允许回收主线程用户栈（root/canvas/s3d 都在其上）。
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# 渲染线程每轮都会 yield 且只差一次循环判定，正常情况下几百次切换内即退出；
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# 设上限只是防止它已异常终止却没置标记时把主线程永远卡在这里。
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if _render_tid > 0:
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wait_n: int = 0
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while _render_done == 0 and wait_n < 10000:
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wait_n += 1
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process.yield_cpu()
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process.exit(0)
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return 0
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