From 85a13ec645f8da92e2e0a263d7f21746a3afcde5 Mon Sep 17 00:00:00 2001
From: Sascha Willems <webmaster@saschawillems.de>
Date: Sun, 21 Apr 2019 15:39:28 +0200
Subject: [PATCH] Color triangle using barycentric coordinates

---
 .../nv_ray_tracing_basic/closesthit.rchit       |   3 ++-
 .../nv_ray_tracing_basic/closesthit.rchit.spv   | Bin 444 -> 780 bytes
 .../nv_ray_tracing_basic.cpp                    |  12 ------------
 3 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/data/shaders/nv_ray_tracing_basic/closesthit.rchit b/data/shaders/nv_ray_tracing_basic/closesthit.rchit
index dea0056d..e8141504 100644
--- a/data/shaders/nv_ray_tracing_basic/closesthit.rchit
+++ b/data/shaders/nv_ray_tracing_basic/closesthit.rchit
@@ -7,5 +7,6 @@ hitAttributeNV vec3 attribs;
 
 void main()
 {
-  hitValue = vec3(1.0, 1.0, 1.0);
+  const vec3 barycentricCoords = vec3(1.0f - attribs.x - attribs.y, attribs.x, attribs.y);
+  hitValue = barycentricCoords;
 }
diff --git a/data/shaders/nv_ray_tracing_basic/closesthit.rchit.spv b/data/shaders/nv_ray_tracing_basic/closesthit.rchit.spv
index 63bfa61aaf4ecd4b05a58394fe6e3f1ed707c506..3a89e180e527cbc7d5d785969bfab09d2a755ff1 100644
GIT binary patch
literal 780
zcmZ8eO-n*i5FJ0BnwDm!_MOo(kQNm|R78Xu3BizdkLy=m(D&&1T(}GRYc2Z+MZcp>
z&^cExnD;T<nKNf*&fFJ^9wtR1l9ZI}%k<<WDqrg&X-P=4(Q@xwZlES^7^sf+o<uUh
zBcRsm&3bhdcB?0+$E?gs%rsywCyu<MM;!i8X^)8*z9{Yw5aO6utGjoP53c8XV^8<}
zVCcS#)j;=kFF-!Q{NiYIjsNTEK=~4SwpB3c^t>?8om<}zx+7rZF5^}q;PwcyBfE&7
zb=XpaaSyK4z#+EB0H*+j)OcXjit$VE6Tm94GWd8f6LZ@N;uLOTv?IjirePwl*UV?&
zec~;cznI0;MXZQ;1%3s_!+OS96HWW);FHU~HeY~`XEgJ7aDUJBXUv_5ondG0!~eiT
z%|AdK+|)wtd_QWt0m@mcFzTa*OK><h4<r5t4&yZ#cO-7>FwWFbo2@ItCvNLX@L5aT
z)|KHe&f5S++;TQ&ocZ2cz=$`Xi2Ao-?9W=}uCOh4BThZ!@IMn{&i?mbyyQ9T523<C
AumAu6

delta 184
zcmeBS+r!Mu%%sfDz`)4B&cMOIH<5R%Ix7Pw0|P@wW=U9LPH8HT$-v6M!oUlp6H7{p
zGLwoK+<|<~$*hddvG+t6fEpPXtbrmNKpLbIB&H4IvjN#$K+M3<V6Ow@fz)vWF-Q!C
l6@cn^fc)D?=79Jh+ip+3%P22m$G{9W6{Pbo(3uuM3;<s(6gB_=

diff --git a/examples/nv_ray_tracing_basic/nv_ray_tracing_basic.cpp b/examples/nv_ray_tracing_basic/nv_ray_tracing_basic.cpp
index 668d6b90..bf970be0 100644
--- a/examples/nv_ray_tracing_basic/nv_ray_tracing_basic.cpp
+++ b/examples/nv_ray_tracing_basic/nv_ray_tracing_basic.cpp
@@ -594,18 +594,6 @@ public:
 
 		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
 		{
-			VkClearValue clearValues[2];
-			clearValues[0].color = defaultClearColor;
-			clearValues[1].depthStencil = { 1.0f, 0 };
-
-			VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
-			renderPassBeginInfo.renderPass = renderPass;
-			renderPassBeginInfo.framebuffer = frameBuffers[i];
-			renderPassBeginInfo.renderArea.extent.width = width;
-			renderPassBeginInfo.renderArea.extent.height = height;
-			renderPassBeginInfo.clearValueCount = 2;
-			renderPassBeginInfo.pClearValues = clearValues;
-
 			VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
 
 			/*