源码 / Ch14/Editor/Ch14Shots.cs
Ch14/Editor/Ch14Shots.cs
// 第 14 章配图 using System.Collections.Generic; using Cookbook.Core; using UnityEngine; using UnityEngine.Rendering.Universal; namespace Cookbook.Ch14 { static class Shots { // ---------- 小工具 ---------- static void Kw(Material m, string prefix, string[] opts, int pick) { for (int i = 0; i < opts.Length; i++) if (i == pick) m.EnableKeyword(prefix + opts[i]); else m.DisableKeyword(prefix + opts[i]); } static Material Toon(Shot s, Color c, float outline = 2.5f) { var m = s.Mat("Cookbook/Ch14/ToonLit"); m.SetColor("_BaseColor", c); m.SetFloat("_OutlineWidth", outline); Kw(m, "_OUTLINENORMAL_", new[] { "MESH", "TANGENT", "VERTEXCOLOR" }, 0); return m; } // 卡通场景的“摄影棚”：浅色背景 + 同样用卡通 Shader 的地面（这样地面上的影子也是硬边） static void Stage(Shot s, Color? floor = null) { s.Background(new Color(0.78f, 0.84f, 0.9f)); var f = Toon(s, floor ?? new Color(0.86f, 0.88f, 0.82f), 0); f.SetColor("_ShadeColor", new Color(0.72f, 0.74f, 0.86f)); f.SetFloat("_Shade2Strength", 0); f.SetFloat("_SpecStrength", 0); f.SetFloat("_RimStrength", 0); s.Floor(f); } static Texture2D Gen(Shot s, Texture2D t) { t.hideFlags = HideFlags.DontSave; s.Temp.Add(t); return t; } // 带鼻子、眼窝起伏的“头”：在单位球上做几处位移，再重新算法线 static Mesh FaceMesh() { var tmp = GameObject.CreatePrimitive(PrimitiveType.Sphere); var mesh = Object.Instantiate(tmp.GetComponent<MeshFilter>().sharedMesh); Object.DestroyImmediate(tmp); var v = mesh.vertices; for (int i = 0; i < v.Length; i++) { Vector3 p = v[i]; if (p.z > 0) continue; // 只动正面（-Z） float nose = Mathf.Exp(-(p.x * p.x) / 0.004f - Mathf.Pow(p.y + 0.03f, 2) / 0.012f); float sockets = Mathf.Exp(-Mathf.Pow(Mathf.Abs(p.x) - 0.15f, 2) / 0.006f - Mathf.Pow(p.y - 0.06f, 2) / 0.004f); float cheeks = Mathf.Exp(-Mathf.Pow(Mathf.Abs(p.x) - 0.2f, 2) / 0.01f - Mathf.Pow(p.y + 0.08f, 2) / 0.01f); v[i] = p + p.normalized * (0.09f * nose - 0.035f * sockets + 0.02f * cheeks); } mesh.vertices = v; mesh.RecalculateNormals(); mesh.RecalculateTangents(); mesh.RecalculateBounds(); return mesh; } static Texture2D s_FaceSdf, s_MaskViz, s_SdfViz; static Texture2D FaceSdf() { if (s_FaceSdf == null) { s_FaceSdf = FaceSdfGenerator.Generate(256, 9, out s_MaskViz, out s_SdfViz); s_FaceSdf.hideFlags = s_MaskViz.hideFlags = s_SdfViz.hideFlags = HideFlags.DontSave; } return s_FaceSdf; } static Material FaceMat(Shot s, int mode) { var m = s.Mat("Cookbook/Ch14/ToonFace"); Kw(m, "_FACESHADOW_", new[] { "NORMAL", "SDF" }, mode); m.SetTexture("_FaceSdf", FaceSdf()); return m; } // 发丝噪声：沿 V 不变、沿 U 随机（与第 12 章同样的思路，这里单独生成，不依赖别的章节） static Texture2D StrandNoise(Shot s) { const int W = 256, H = 16; var t = new Texture2D(W, H, TextureFormat.RGBA32, true, true) { wrapMode = TextureWrapMode.Repeat }; var rnd = new System.Random(11); var lo = new float[25]; for (int k = 0; k < 25; k++) lo[k] = (float)rnd.NextDouble(); lo[24] = lo[0]; var px = new Color[W * H]; for (int x = 0; x < W; x++) { float f = x / (float)W * 24f; int i0 = (int)f; float w = f - i0; w = w * w * (3 - 2 * w); float v = 0.75f * Mathf.Lerp(lo[i0], lo[i0 + 1], w) + 0.25f * (float)rnd.NextDouble(); for (int y = 0; y < H; y++) px[y * W + x] = new Color(v, v, v, 1); } t.SetPixels(px); t.Apply(); return Gen(s, t); } static Material HairMat(Shot s, int ring) { var m = s.Mat("Cookbook/Ch14/ToonHair"); Kw(m, "_RING_", new[] { "OFF", "SMOOTH", "TOON" }, ring); m.SetTexture("_ShiftTex", StrandNoise(s)); return m; } // ---------- 14.2 色阶 ---------- static Material RampMat(Shot s, int mode) { var m = s.Mat("Cookbook/Ch14/ToonRamp"); Kw(m, "_RAMP_", new[] { "LAMBERT", "STEP", "SMOOTH", "TEXTURE" }, mode); m.SetTexture("_RampTex", s.CoreTex("ramp_toon3")); return m; } [BookShot("ch14-ramp", W = 480, H = 400, Panels = 4)] static void Ramp(Shot s) { Stage(s); var m = RampMat(s, s.Panel); s.Sphere(m, new Vector3(-0.35f, 0.75f, 0), 1.3f); s.Knot(m, new Vector3(0.75f, 0.45f, -0.6f), 0.5f); s.SunDir(40, -60, 1.2f); s.LookAt(new Vector3(0, 1.4f, -3.8f), new Vector3(0.1f, 0.6f, 0), 36); } // 故意用很低的分辨率渲染，正文里放大显示，像素台阶一目了然 [BookShot("ch14-ramp-aa", W = 160, H = 100, Panels = 2)] static void RampAA(Shot s) { s.Background(new Color(0.78f, 0.84f, 0.9f)); var m = RampMat(s, s.Panel == 0 ? 1 : 2); m.SetFloat("_Softness", 0f); // 只靠 fwidth 给出的“一像素过渡” s.Sphere(m, new Vector3(0, 0, 0), 2f); s.SunDir(10, -95, 1.2f); // 让明暗交界线斜穿画面 s.LookAt(new Vector3(0.0f, 0.55f, -1.6f), new Vector3(0.0f, 0.5f, -0.6f), 22); s.CamData.antialiasing = AntialiasingMode.None; s.Asset.msaaSampleCount = 1; // 关掉 MSAA：着色锯齿与几何锯齿无关，MSAA 救不了它 } // ---------- 14.3 阴影色 ---------- [BookShot("ch14-shade", W = 640, H = 420, Panels = 3)] static void Shade(Shot s) { Stage(s); var m = RampMat(s, 2); var baseC = new Color(0.95f, 0.55f, 0.4f); m.SetColor("_BaseColor", baseC); if (s.Panel == 0) m.SetColor("_ShadeColor", baseC * 0.45f); // 灰暗：固有色 × 0.45 else m.SetColor("_ShadeColor", new Color(0.62f, 0.32f, 0.42f)); // 手挑：偏紫、饱和度不降 m.SetFloat("_Shade2Strength", s.Panel == 2 ? 1 : 0); s.Sphere(m, new Vector3(-0.55f, 0.7f, 0.2f), 1.2f); var c = s.Cylinder(m, new Vector3(0.75f, 0.55f, -0.2f), 1); c.transform.localScale = new Vector3(0.7f, 0.55f, 0.7f); s.SunDir(35, -55, 1.2f); s.LookAt(new Vector3(0, 1.5f, -3.8f), new Vector3(0.1f, 0.6f, 0), 36); } // ---------- 14.4 边缘光 ---------- static void Bust(Shot s, Material body, Material head) { var b = s.Capsule(body, new Vector3(0, 0.75f, 0), 1); b.transform.localScale = new Vector3(0.85f, 0.75f, 0.6f); s.Sphere(head, new Vector3(0, 1.85f, 0), 0.85f); } [BookShot("ch14-rim", W = 480, H = 480, Panels = 4)] static void Rim(Shot s) { Stage(s, new Color(0.3f, 0.32f, 0.4f)); s.Background(new Color(0.12f, 0.14f, 0.2f)); // 深色背景，亮色边缘光才看得清 s.Renderer.copyDepthMode = CopyDepthMode.ForcePrepass; // 深度边缘光要在不透明物体着色时就能读到深度 var m = s.Mat("Cookbook/Ch14/ToonRimSpec"); Kw(m, "_RIM_", new[] { "OFF", "FRESNEL", "LIGHTMASKED", "DEPTH" }, s.Panel); Kw(m, "_SPEC_", new[] { "OFF", "BLINN", "TOON", "STYLIZED" }, 0); m.SetColor("_RimColor", new Color(1.3f, 1.05f, 0.6f)); m.SetFloat("_RimWidth", 0.35f); m.SetFloat("_RimWidthPx", 6f); Bust(s, m, m); s.SunDir(30, 120, 1.3f); // 侧后方的主光，边缘光应出现在右后侧轮廓 s.LookAt(new Vector3(0, 1.6f, -4.2f), new Vector3(0, 1.25f, 0), 38); } // ---------- 14.5 风格化高光 ---------- [BookShot("ch14-spec", W = 480, H = 400, Panels = 4)] static void Spec(Shot s) { Stage(s); var m = s.Mat("Cookbook/Ch14/ToonRimSpec"); Kw(m, "_RIM_", new[] { "OFF", "FRESNEL", "LIGHTMASKED", "DEPTH" }, 0); int mode = s.Panel == 0 ? 1 : s.Panel == 1 ? 2 : 3; Kw(m, "_SPEC_", new[] { "OFF", "BLINN", "TOON", "STYLIZED" }, mode); m.SetFloat("_SpecThreshold", 0.96f); if (s.Panel == 2) { m.SetVector("_SpecShiftScale", new Vector4(0.15f, 0.05f, 0.65f, 0)); } if (s.Panel == 3) { m.SetVector("_SpecSplit", new Vector4(0.13f, 0.13f, 0, 0)); m.SetFloat("_SpecSquare", 1f); m.SetFloat("_SpecThreshold", 0.993f); } s.Sphere(m, new Vector3(0, 0.9f, 0), 1.6f); s.SunDir(35, -20, 1.2f); s.LookAt(new Vector3(0, 1.3f, -3.6f), new Vector3(0, 0.85f, 0), 36); } // ---------- 14.6 描边：线宽 ---------- [BookShot("ch14-outline-width", W = 640, H = 400, Panels = 2)] static void OutlineWidth(Shot s) { Stage(s); for (int k = 0; k < 5; k++) { var m = s.Mat("Cookbook/Ch14/ToonOutline"); Kw(m, "_OUTLINESPACE_", new[] { "OBJECT", "CLIP" }, s.Panel); Kw(m, "_OUTLINENORMAL_", new[] { "MESH", "TANGENT", "VERTEXCOLOR" }, 0); m.SetFloat("_OutlineWidthOS", 0.03f); m.SetFloat("_OutlineWidth", 2.5f); s.Capsule(m, new Vector3(-1.6f + k * 1.3f, 0.55f, -1.5f + k * 2.8f), 0.55f); } s.SunDir(40, -40, 1.2f); s.LookAt(new Vector3(-1.2f, 1.2f, -4.0f), new Vector3(0.4f, 0.6f, 3), 40); } // ---------- 14.7 描边：平滑法线 ---------- // 程序化的“硬边”网格：每个面独立顶点（平直着色），描边会在棱角处断开 static Mesh Prism(int sides, float radius, float height) { var v = new List<Vector3>(); var t = new List<int>(); var uv = new List<Vector2>(); void Tri(Vector3 a, Vector3 b, Vector3 c) { int i = v.Count; v.Add(a); v.Add(b); v.Add(c); uv.Add(Vector2.zero); uv.Add(Vector2.right); uv.Add(Vector2.up); t.Add(i); t.Add(i + 1); t.Add(i + 2); } Vector3 P(int k, float y) { float a = k * Mathf.PI * 2 / sides; return new Vector3(Mathf.Cos(a) * radius, y, Mathf.Sin(a) * radius); } for (int k = 0; k < sides; k++) { Vector3 a0 = P(k, 0), a1 = P(k + 1, 0), b0 = P(k, height), b1 = P(k + 1, height); Tri(a0, b0, b1); Tri(a0, b1, a1); Tri(new Vector3(0, height, 0), b1, b0); Tri(Vector3.zero, a0, a1); } var m = new Mesh(); m.SetVertices(v); m.SetTriangles(t, 0); m.SetUVs(0, uv); m.RecalculateNormals(); m.RecalculateTangents(); m.RecalculateBounds(); return m; } // 低多边形宝石：八面体细分一次后不平滑，所有面都是硬边 static Mesh Gem() { Vector3[] o = { Vector3.up, Vector3.down, Vector3.left, Vector3.right, Vector3.forward, Vector3.back }; int[,] f = { { 0, 4, 3 }, { 0, 3, 5 }, { 0, 5, 2 }, { 0, 2, 4 }, { 1, 3, 4 }, { 1, 5, 3 }, { 1, 2, 5 }, { 1, 4, 2 } }; var v = new List<Vector3>(); var t = new List<int>(); var uv = new List<Vector2>(); for (int i = 0; i < 8; i++) { Vector3 a = o[f[i, 0]], b = o[f[i, 1]], c = o[f[i, 2]]; Vector3 ab = (a + b).normalized, bc = (b + c).normalized, ca = (c + a).normalized; foreach (var tri in new[] { new[] { a, ab, ca }, new[] { ab, b, bc }, new[] { ca, bc, c }, new[] { ab, bc, ca } }) { int n = v.Count; foreach (var p in tri) { v.Add(new Vector3(p.x * 0.5f, p.y * 0.75f, p.z * 0.5f)); uv.Add(new Vector2(p.x, p.z)); } t.Add(n); t.Add(n + 1); t.Add(n + 2); } } var m = new Mesh(); m.SetVertices(v); m.SetTriangles(t, 0); m.SetUVs(0, uv); m.RecalculateNormals(); m.RecalculateTangents(); m.RecalculateBounds(); return m; } [BookShot("ch14-outline-smooth", W = 640, H = 400, Panels = 2)] static void OutlineSmooth(Shot s) { Stage(s); bool smooth = s.Panel == 1; Material Mat() { var m = s.Mat("Cookbook/Ch14/ToonOutline"); Kw(m, "_OUTLINESPACE_", new[] { "OBJECT", "CLIP" }, 1); Kw(m, "_OUTLINENORMAL_", new[] { "MESH", "TANGENT", "VERTEXCOLOR" }, smooth ? 1 : 0); m.SetFloat("_OutlineWidth", 5f); return m; } // 与编辑器菜单调用的是同一个 SmoothNormalBaker.Bake Mesh Prep(Mesh mesh) { if (smooth) SmoothNormalBaker.Bake(mesh, SmoothNormalBaker.Target.Tangent); return mesh; } var tmp = GameObject.CreatePrimitive(PrimitiveType.Cube); var cube = Object.Instantiate(tmp.GetComponent<MeshFilter>().sharedMesh); // 内置网格是共享的，先复制 Object.DestroyImmediate(tmp); var go = s.MeshObj(Prep(cube), Mat(), new Vector3(-1.25f, 0.5f, 0), 0.9f, "Cube"); go.transform.rotation = Quaternion.Euler(0, 35, 0); s.MeshObj(Prep(Prism(6, 0.5f, 0.9f)), Mat(), new Vector3(0.05f, 0.0f, 0.3f), 1, "Prism"); var gem = s.MeshObj(Prep(Gem()), Mat(), new Vector3(1.25f, 0.75f, -0.1f), 1, "Gem"); gem.transform.rotation = Quaternion.Euler(0, 20, 0); s.SunDir(40, -40, 1.2f); s.LookAt(new Vector3(0, 1.8f, -3.9f), new Vector3(0, 0.5f, 0), 38); } // ---------- 14.8 天使环 ---------- [BookShot("ch14-angelring", W = 480, H = 440, Panels = 3)] static void AngelRing(Shot s) { Stage(s); s.Sphere(HairMat(s, s.Panel), new Vector3(0, 1.0f, 0), 1.5f); s.SunDir(35, -35, 1.2f); s.LookAt(new Vector3(0, 1.5f, -3.6f), new Vector3(0, 0.95f, 0), 34); } // ---------- 14.9 面部 SDF ---------- [BookShot("ch14-face-sdfmap", W = 400, H = 400, Panels = 3)] static void FaceSdfMap(Shot s) { FaceSdf(); var tex = s.Panel == 0 ? s_MaskViz : s.Panel == 1 ? s_SdfViz : s_FaceSdf; var m = s.Mat("Universal Render Pipeline/Unlit"); m.SetTexture("_BaseMap", tex); s.Quad(m, Vector3.zero, 1); s.Background(Color.white); s.Cam.orthographic = true; s.Cam.orthographicSize = 0.5f; s.Cam.transform.position = new Vector3(0, 0, -2); s.Cam.transform.rotation = Quaternion.identity; s.Sun.intensity = 0; } static void FaceScene(Shot s, Material face, float lightYaw) { s.Background(new Color(0.78f, 0.84f, 0.9f)); s.MeshObj(FaceMesh(), face, new Vector3(0, 0, 0), 1.6f, "Head"); // 光在头部的水平面内绕一圈：yaw = 光“照向”的方向 s.Sun.transform.rotation = Quaternion.Euler(15, lightYaw, 0); s.Sun.intensity = 1.2f; s.Sun.shadows = LightShadows.None; s.LookAt(new Vector3(0, 0.1f, -3.4f), new Vector3(0, 0, 0), 32); } [BookShot("ch14-face-compare", W = 480, H = 440, Panels = 2)] static void FaceCompare(Shot s) => FaceScene(s, FaceMat(s, s.Panel), -60); [BookShot("ch14-face-angles", W = 400, H = 400, Panels = 4)] static void FaceAngles(Shot s) { // 光从画面右侧（+X）照来：照向的方向 yaw = 180 + 夹角... 这里用 -(夹角) 表示从正面逐渐转到右侧再到背后 float phi = new[] { 20f, 60f, 100f, 140f }[s.Panel]; FaceScene(s, FaceMat(s, 1), -phi); } // ---------- 14.10 卡通化接收阴影 ---------- // 三格：不接收阴影 / 接收但不卡通化 / 卡通化 [BookShot("ch14-toon-shadow", W = 560, H = 420, Panels = 3)] static void ToonShadow(Shot s) { Stage(s); // 故意把阴影图降到 512：软阴影的过渡带和交界线锯齿都会被放大，便于观察 s.AssetProp("m_MainLightShadowmapResolution", 512); var body = Toon(s, new Color(0.95f, 0.7f, 0.5f), 2.5f); var floor = GameObject.Find("Floor").GetComponent<MeshRenderer>().sharedMaterial; foreach (var m in new[] { body, floor }) { m.SetFloat("_ReceiveShadow", s.Panel == 0 ? 0 : 1); m.SetFloat("_ShadowSoftness", s.Panel == 1 ? 0.5f : 0.03f); } body.SetFloat("_SpecStrength", 0); var cap = s.Capsule(body, new Vector3(0.3f, 1.0f, 0), 1); cap.transform.localScale = new Vector3(1.1f, 1.0f, 1.1f); var pillar = s.Cube(Toon(s, new Color(0.55f, 0.65f, 0.85f)), new Vector3(-1.5f, 1.4f, -1.2f), 1); pillar.transform.localScale = new Vector3(0.35f, 2.8f, 0.35f); s.SunDir(30, 60, 1.3f); // 从左前方照来，柱子的影子斜穿胶囊的受光面 s.LookAt(new Vector3(-0.2f, 1.6f, -4.4f), new Vector3(-0.3f, 0.9f, 0), 40); } // ---------- 14.11 完整的 Toon Shader ---------- static void ToyScene(Shot s, int stage) { Stage(s, new Color(0.82f, 0.9f, 0.78f)); var floor = GameObject.Find("Floor").GetComponent<MeshRenderer>().sharedMaterial; Material M(Color c) { var m = Toon(s, c, stage >= 3 ? 2.5f : 0f); m.SetFloat("_ReceiveShadow", stage >= 1 ? 1 : 0); m.SetFloat("_Shade2Strength", stage >= 1 ? 1 : 0); m.SetFloat("_SpecStrength", stage >= 2 ? 1 : 0); m.SetFloat("_RimStrength", stage >= 2 ? 0.6f : 0); // 描边用平滑法线（顶点色模式）：运行时对网格副本调用烘焙函数 Kw(m, "_OUTLINENORMAL_", new[] { "MESH", "TANGENT", "VERTEXCOLOR" }, 2); return m; } floor.SetFloat("_ReceiveShadow", stage >= 1 ? 1 : 0); floor.SetFloat("_AddLightStrength", 0.35f); GameObject Smooth(GameObject go) { var mf = go.GetComponent<MeshFilter>(); var mesh = Object.Instantiate(mf.sharedMesh); SmoothNormalBaker.Bake(mesh, SmoothNormalBaker.Target.VertexColor); mf.sharedMesh = mesh; s.Temp.Add(mesh); return go; } // 小人：身体、四肢、头、头发 var shirt = M(new Color(0.95f, 0.45f, 0.4f)); var skin = M(new Color(1f, 0.85f, 0.75f)); var pants = M(new Color(0.35f, 0.45f, 0.8f)); var body = Smooth(s.Capsule(shirt, new Vector3(0, 1.0f, 0), 1)); body.transform.localScale = new Vector3(0.7f, 0.45f, 0.55f); foreach (float x in new[] { -0.17f, 0.17f }) { var leg = Smooth(s.Capsule(pants, new Vector3(x, 0.35f, 0), 1)); leg.transform.localScale = new Vector3(0.26f, 0.35f, 0.26f); var arm = Smooth(s.Capsule(skin, new Vector3(x * 2.6f, 1.0f, 0), 1)); arm.transform.localScale = new Vector3(0.18f, 0.32f, 0.18f); arm.transform.rotation = Quaternion.Euler(0, 0, x > 0 ? 25 : -25); } var faceMat = FaceMat(s, 1); if (stage < 1) Kw(faceMat, "_FACESHADOW_", new[] { "NORMAL", "SDF" }, 0); var head = s.MeshObj(FaceMesh(), faceMat, new Vector3(0, 1.75f, 0), 0.8f, "Head"); var hairMat = HairMat(s, stage >= 2 ? 2 : 0); faceMat.SetFloat("_OutlineWidth", stage >= 3 ? 2.5f : 0); hairMat.SetFloat("_OutlineWidth", stage >= 3 ? 2.5f : 0); var hair = s.Sphere(hairMat, new Vector3(0, 1.82f, 0.07f), 0.86f); // 道具 var knot = Smooth(s.Knot(M(new Color(0.98f, 0.8f, 0.3f)), new Vector3(1.55f, 0.55f, 0.3f), 0.55f)); var box = Smooth(s.Cube(M(new Color(0.55f, 0.8f, 0.7f)), new Vector3(-1.45f, 0.4f, 0.2f), 0.8f)); box.transform.rotation = Quaternion.Euler(0, 30, 0); var ball = Smooth(s.Sphere(M(new Color(0.75f, 0.55f, 0.95f)), new Vector3(-0.9f, 0.25f, -0.8f), 0.5f)); s.SunDir(40, -40, 1.25f); // 两盏彩色点光：卡通化后是边界清晰的彩色光斑 s.Point(new Vector3(1.2f, 1.2f, -0.7f), new Color(1f, 0.45f, 0.7f), 0.9f, 2.0f); s.Point(new Vector3(-1.5f, 1.1f, -0.6f), new Color(0.35f, 0.75f, 1f), 0.9f, 2.0f); s.LookAt(new Vector3(0, 1.9f, -5.0f), new Vector3(0, 0.95f, 0), 36); } [BookShot("ch14-final", W = 960, H = 540)] static void Final(Shot s) => ToyScene(s, 3); [BookShot("ch14-final-breakdown", W = 480, H = 360, Panels = 4)] static void Breakdown(Shot s) => ToyScene(s, s.Panel); } }