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WIP morphtarget and skin
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@ousttrue
ousttrue committed Oct 6, 2024
1 parent fbf2adb commit 686208e
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8 changes: 8 additions & 0 deletions deps/sokol_samples/build.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -190,6 +190,14 @@ pub const samples = [_]Sample{
.name = "camera",
.root_source_file = "tutorials/camera/main.zig",
},
.{
.name = "morphtarget",
.root_source_file = "tutorials/morphtarget/main.zig",
},
.{
.name = "skin",
.root_source_file = "tutorials/skin/main.zig",
},
//
.{
.name = "glb",
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358 changes: 358 additions & 0 deletions deps/sokol_samples/tutorials/morphtarget/main.zig
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Original file line number Diff line number Diff line change
@@ -0,0 +1,358 @@
const std = @import("std");
const sokol = @import("sokol");
const sg = sokol.gfx;

const title = "morphtarget";
const zigltf = @import("zigltf");
const rowmath = @import("rowmath");
const framework = @import("framework");
const Scene = framework.Scene;

const minimal_gltf =
\\{
\\ "scene": 0,
\\ "scenes":[
\\ {
\\ "nodes":[
\\ 0
\\ ]
\\ }
\\ ],
\\ "nodes":[
\\ {
\\ "mesh":0
\\ }
\\ ],
\\ "meshes":[
\\ {
\\ "primitives":[
\\ {
\\ "attributes":{
\\ "POSITION":1
\\ },
\\ "targets":[
\\ {
\\ "POSITION":2
\\ },
\\ {
\\ "POSITION":3
\\ }
\\ ],
\\ "indices":0
\\ }
\\ ],
\\ "weights":[
\\ 1.0,
\\ 0.5
\\ ]
\\ }
\\ ],
\\
\\ "animations":[
\\ {
\\ "samplers":[
\\ {
\\ "input":4,
\\ "interpolation":"LINEAR",
\\ "output":5
\\ }
\\ ],
\\ "channels":[
\\ {
\\ "sampler":0,
\\ "target":{
\\ "node":0,
\\ "path":"weights"
\\ }
\\ }
\\ ]
\\ }
\\ ],
\\
\\ "buffers":[
\\ {
\\ "uri":"data:application/gltf-buffer;base64,AAABAAIAAAAAAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAAAAAA/AAAAPwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIC/AACAPwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIA/AACAPwAAAAA=",
\\ "byteLength":116
\\ },
\\ {
\\ "uri":"data:application/gltf-buffer;base64,AAAAAAAAgD8AAABAAABAQAAAgEAAAAAAAAAAAAAAAAAAAIA/AACAPwAAgD8AAIA/AAAAAAAAAAAAAAAA",
\\ "byteLength":60
\\ }
\\ ],
\\ "bufferViews":[
\\ {
\\ "buffer":0,
\\ "byteOffset":0,
\\ "byteLength":6,
\\ "target":34963
\\ },
\\ {
\\ "buffer":0,
\\ "byteOffset":8,
\\ "byteLength":108,
\\ "byteStride":12,
\\ "target":34962
\\ },
\\ {
\\ "buffer":1,
\\ "byteOffset":0,
\\ "byteLength":20
\\ },
\\ {
\\ "buffer":1,
\\ "byteOffset":20,
\\ "byteLength":40
\\ }
\\ ],
\\ "accessors":[
\\ {
\\ "bufferView":0,
\\ "byteOffset":0,
\\ "componentType":5123,
\\ "count":3,
\\ "type":"SCALAR",
\\ "max":[
\\ 2
\\ ],
\\ "min":[
\\ 0
\\ ]
\\ },
\\ {
\\ "bufferView":1,
\\ "byteOffset":0,
\\ "componentType":5126,
\\ "count":3,
\\ "type":"VEC3",
\\ "max":[
\\ 1.0,
\\ 0.5,
\\ 0.0
\\ ],
\\ "min":[
\\ 0.0,
\\ 0.0,
\\ 0.0
\\ ]
\\ },
\\ {
\\ "bufferView":1,
\\ "byteOffset":36,
\\ "componentType":5126,
\\ "count":3,
\\ "type":"VEC3",
\\ "max":[
\\ 0.0,
\\ 1.0,
\\ 0.0
\\ ],
\\ "min":[
\\ -1.0,
\\ 0.0,
\\ 0.0
\\ ]
\\ },
\\ {
\\ "bufferView":1,
\\ "byteOffset":72,
\\ "componentType":5126,
\\ "count":3,
\\ "type":"VEC3",
\\ "max":[
\\ 1.0,
\\ 1.0,
\\ 0.0
\\ ],
\\ "min":[
\\ 0.0,
\\ 0.0,
\\ 0.0
\\ ]
\\ },
\\ {
\\ "bufferView":2,
\\ "byteOffset":0,
\\ "componentType":5126,
\\ "count":5,
\\ "type":"SCALAR",
\\ "max":[
\\ 4.0
\\ ],
\\ "min":[
\\ 0.0
\\ ]
\\ },
\\ {
\\ "bufferView":3,
\\ "byteOffset":0,
\\ "componentType":5126,
\\ "count":10,
\\ "type":"SCALAR",
\\ "max":[
\\ 1.0
\\ ],
\\ "min":[
\\ 0.0
\\ ]
\\ }
\\ ],
\\
\\ "asset":{
\\ "version":"2.0"
\\ }
\\}
;

const state = struct {
var pass_action = sg.PassAction{};
var input = rowmath.InputState{};
var orbit = rowmath.OrbitCamera{};
var gltf: ?std.json.Parsed(zigltf.Gltf) = null;
var scene = Scene{};
};

export fn init() void {
sg.setup(.{
.environment = sokol.glue.environment(),
.logger = .{ .func = sokol.log.func },
});
sokol.time.setup();
sokol.gl.setup(.{
.logger = .{ .func = sokol.log.func },
});

var debugtext_desc = sokol.debugtext.Desc{
.logger = .{ .func = sokol.log.func },
};
debugtext_desc.fonts[0] = sokol.debugtext.fontOric();
sokol.debugtext.setup(debugtext_desc);

state.pass_action.colors[0] = .{
.load_action = .CLEAR,
.clear_value = .{ .r = 0.1, .g = 0.1, .b = 0.1, .a = 1.0 },
};

state.scene.init(std.heap.c_allocator);

// parse gltf
const allocator = std.heap.c_allocator;
const parsed = std.json.parseFromSlice(
zigltf.Gltf,
allocator,
minimal_gltf,
.{
.ignore_unknown_fields = true,
},
) catch |e| {
std.debug.print("{s}\n", .{@errorName(e)});
@panic("parseFromSlice");
};

// build
state.scene.load(parsed, null) catch |e| {
std.debug.print("{s}\n", .{@errorName(e)});
@panic("Scene.load");
};
}

export fn frame() void {
state.input.screen_width = sokol.app.widthf();
state.input.screen_height = sokol.app.heightf();
state.orbit.frame(state.input);
state.input.mouse_wheel = 0;

const now = sokol.time.now();
const sec: f32 = @floatCast(sokol.time.sec(now));

sokol.debugtext.canvas(sokol.app.widthf() * 0.5, sokol.app.heightf() * 0.5);
sokol.debugtext.pos(0.5, 0.5);
sokol.debugtext.puts(title);
sokol.debugtext.puts("\n");
var buf: [32]u8 = undefined;

{
const formated = std.fmt.bufPrintZ(
&buf,
"now {d:.2} sec\n",
.{sec},
) catch @panic("bufPrintZ");
sokol.debugtext.puts(formated);
}

if (state.scene.update(sec)) |looptime| {
const formated = std.fmt.bufPrintZ(
&buf,
"loop {d:.2} sec\n",
.{looptime},
) catch @panic("bufPrintZ");
sokol.debugtext.puts(formated);
}

sg.beginPass(.{
.action = state.pass_action,
.swapchain = sokol.glue.swapchain(),
});
state.scene.draw(state.orbit.camera);
sokol.debugtext.draw();
sg.endPass();
sg.commit();
}

export fn event(e: [*c]const sokol.app.Event) void {
switch (e.*.type) {
.MOUSE_DOWN => {
switch (e.*.mouse_button) {
.LEFT => {
state.input.mouse_left = true;
},
.RIGHT => {
state.input.mouse_right = true;
},
.MIDDLE => {
state.input.mouse_middle = true;
},
.INVALID => {},
}
},
.MOUSE_UP => {
switch (e.*.mouse_button) {
.LEFT => {
state.input.mouse_left = false;
},
.RIGHT => {
state.input.mouse_right = false;
},
.MIDDLE => {
state.input.mouse_middle = false;
},
.INVALID => {},
}
},
.MOUSE_MOVE => {
state.input.mouse_x = e.*.mouse_x;
state.input.mouse_y = e.*.mouse_y;
},
.MOUSE_SCROLL => {
state.input.mouse_wheel = e.*.scroll_y;
},
else => {},
}
}

export fn cleanup() void {
sg.shutdown();
}

pub fn main() void {
sokol.app.run(.{
.init_cb = init,
.frame_cb = frame,
.cleanup_cb = cleanup,
.event_cb = event,
.width = 800,
.height = 600,
.window_title = title,
.icon = .{ .sokol_default = true },
.logger = .{ .func = sokol.log.func },
});
}
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