From 3207c47dd2164018a3435a375b80b85eacde1553 Mon Sep 17 00:00:00 2001 From: Xiang Silian Date: Mon, 22 Sep 2025 18:10:55 +0800 Subject: [PATCH] =?UTF-8?q?=E8=99=9A=E7=BA=BF=E7=9A=84=E4=BB=A3=E7=A0=81?= =?UTF-8?q?=E5=AE=8C=E6=88=90=E3=80=82?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- shaders/texture_loading/glsl/point_line.frag | 60 +++++++++++++++--- .../texture_loading/glsl/point_line.frag.spv | Bin 1176 -> 5068 bytes shaders/texture_loading/glsl/point_line.vert | 19 ++++-- .../texture_loading/glsl/point_line.vert.spv | Bin 1928 -> 2508 bytes 4 files changed, 62 insertions(+), 17 deletions(-) diff --git a/shaders/texture_loading/glsl/point_line.frag b/shaders/texture_loading/glsl/point_line.frag index ffb68b9..c51c141 100644 --- a/shaders/texture_loading/glsl/point_line.frag +++ b/shaders/texture_loading/glsl/point_line.frag @@ -1,24 +1,64 @@ #version 450 layout(location = 0) in vec3 fragColor; -layout(location = 1) in float fragLinePosition; +layout(location = 1) in vec3 fragSegmentStart; +layout(location = 2) in vec3 fragSegmentEnd; +layout(location = 3) in vec3 fragWorldPos; layout(location = 0) out vec4 outColor; +layout(binding = 0) uniform UniformBufferObject { + mat4 proj; + mat4 model; + mat4 view; +} ubo; + +layout(binding = 1) uniform DashParameters { + float dashSize; + float gapSize; + float dashOffset; + float uAASize; + int useWorldSpace; +} dashParams; + void main() { - // 硬编码虚线参数 - const float dashSize = 0.05; - const float gapSize = 0.05; + // 转换为NDC坐标 + vec3 ndcStart = fragSegmentStart / fragSegmentStart.z; + vec3 ndcEnd = fragSegmentEnd / fragSegmentEnd.z; + vec3 fragNDC = gl_FragCoord.xyz / gl_FragCoord.z; + fragNDC = (fragNDC * 2.0) - 1.0; + + // 计算当前片元在线段上的投影 + vec2 lineDir = normalize(ndcEnd.xy - ndcStart.xy); + vec2 startToFrag = fragNDC.xy - ndcStart.xy; + float projection = dot(startToFrag, lineDir); - // 使用时间创建动画效果（需要GL_EXT_shader_realtime_clock_speed扩展） - // 或者使用一个简单的基于帧计数的方法 - float time = float(gl_FragCoord.x + gl_FragCoord.y) * 0.01; // 简单的伪时间 + // 计算线段在屏幕空间的长度（用于抗锯齿） + float segmentLength = length(ndcEnd.xy - ndcStart.xy); - float patternPosition = mod(fragLinePosition, dashSize + gapSize); + // 应用虚线模式 + float dashPeriod = dashParams.dashSize + dashParams.gapSize; + float currentPos = mod(projection + dashParams.dashOffset, dashPeriod); - if (patternPosition > dashSize) { + // 抗锯齿处理 + float alpha = 1.0; + + // 线段开始处的抗锯齿（避免线段起始处出现半截虚线） + alpha *= smoothstep(0.0, dashParams.uAASize / segmentLength, projection); + + // 线段结束处的抗锯齿 + alpha *= 1.0 - smoothstep(segmentLength - dashParams.uAASize / segmentLength, + segmentLength, projection); + + // 虚线模式抗锯齿 + alpha *= 1.0 - smoothstep(dashParams.dashSize, + dashParams.dashSize + dashParams.uAASize / dashPeriod, + currentPos); + + // 如果alpha接近0，直接丢弃片元 + if (alpha < 0.01) { discard; } - outColor = vec4(fragColor, 1.0); + outColor = vec4(fragColor, alpha); } \ No newline at end of file diff --git a/shaders/texture_loading/glsl/point_line.frag.spv b/shaders/texture_loading/glsl/point_line.frag.spv index 171c1c9fd5e943065a28be9a65ddb68dc6a3ff00..0b2c07a140953fa1723dff659c58ce8beac7385a 100644 GIT binary patch literal 5068 zcmZ9O`IlTp6~|vP3mC#CVN-~m1ceBO9V1&Z%p?=cKNdT85 zB8m&RApt~177^3~xFW(Y{uBNwdOUiLpU>-eL(z54o%-Hy-K}m_^_!8kTTaQcHQ8y| z>DhbPV4R(;g~{N?%XxZcer8**-`sZH^;c3z14ByG~`^QhP;Wq zg}jZNg`ajL1dWg-%l<)-(QI8dJ+m-9J3BqIYoW2Sve4^4+|C!;txmqsY!!K<-#VOY zcWPqS>NMJ`&D3BFi?oihY%Kc_IXcb8e7|1wfiUA`eTzkXX@>Z*pznr(?XFH!yRmW) zVJE50#n{O0oti9T)zFvP3%j8vyWIlMf$tT}y+)Deok0fUU3ro#QGm(%^Q_4cezOnkuBbF&ZoTFr9LiYk4* z%iY!fWVhWt*+1{L_aR8nz`HKz{fa{zV?Xb}-_vO=c8lfPRu>oZV)meCSN6pLX>3UE4z> z`|a2=m`-xWlJkthP9M2b6K_Xush{-?`$cbdCVu8l{nUs3 zJoZe5ehC~qpSptX8u#OfHu7O}DVVV{^sS|OY==2N4Ynp@yY8NMBau`6cEn*%?q;qb zu5YBHz7KteWned&-OHN$*Umkudza+UVLkUTyB77h{s0p7s2@a9e}5e8VeD@i z%-9j}yC~j)Sbq(??w?z3-awSs!RCFVvWecS`^NN(v-OQxhq`C)8&kgk{cp_rTE|At z!nYz9VvfI~TeoY*Q1_0@-GGm?{tom08^$-It#{Y&wr3UkhD7&n`5lgRb-%Z%e&vwv zcQ)3&2ip@}f4{Hk`b46;zAMr7_j{V!`yEa714Fvsp>*BvP^$Y4O7#9V8S}t;(2lj18uJbEB&2<5s zeB`Av#y6^tUio2}hFJ+#q zxKDz&R`O`YU5>7;Yu4fYk&8Wl3Tz*uj%{E$#bF)#dCy!6zpKFRDg3Sm%PEfV^FF$! 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