StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POGLSL Shader Program Randomly Fails to Compile
primarykey
Id
20736364
data
AcceptedAnswerId
0
AnswerCount
1
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2013-12-23T02:49:00.883
FavoriteCount
0
LastActivityDate
2013-12-23T04:31:55.923
LastEditDate
2013-12-23T03:48:36.303
LastEditorUserId
298151
OwnerUserId
298151
ParentId
0
PostTypeId
1
Score
2
ViewCount
708
LastEditorDisplayName
text
Body
I'm experiencing a strange behaviour in my OpenGL application. I generate a number of GLSL programs during the initialization of the program. The shader programs are read from text files and the programs are compiled and linked. However, I randomly encounter compilation errors for one of the shader programs (a pass-through vertex shader). I cannot understand why the program loads perfectly fine and the shader program successfully compiles several times but fails to do in other times! Here is the shader code: <pre><code>#version 330 // vertex position in the model space layout(location = 0) in vec3 inPosition; layout(location = 1) in vec2 inTexCoord; // will be interporlated for each fragment smooth out vec2 vTexCoord; // uniforms uniform mat4 projectionMatrix; uniform mat4 modelViewMatrix; void main(void) { gl_Position = projectionMatrix * modelViewMatrix * vec4(inPosition, 1.0); vTexCoord = inTexCoord; } </code></pre> And here is the code for compiling the shader (passThroughVertShader is a QString): <pre><code>this->passThroughVertShader = glCreateShader(GL_VERTEX_SHADER); const char *passThroughVertShaderCodeC = passThroughVertShaderCode.toStdString().c_str(); sourceCode = passThroughVertShaderCodeC; glShaderSource(this->passThroughVertShader, 1, &sourceCode, NULL); glCompileShader(this->passThroughVertShader); glGetShaderiv(this->passThroughVertShader, GL_COMPILE_STATUS, &isCompiled); if(isCompiled == GL_FALSE) { qDebug("ERROR compiling pass-through vertex shader.."); exit(-1); } glAttachShader(this->shaderProgram, this->passThroughVertShader); </code></pre> And the function that loads it: <pre><code>QString MyClass::readShaderFile(const QString &filename) { QString content; QFile file(filename); if (file.open(QIODevice::ReadOnly)) { QTextStream tStream(&file); content = tStream.readAll(); } return content; } </code></pre> Update: Following Andon's suggestion, I double checked and I wasn't checking the log after failure. Here is what the log says: <pre><code>Error: 0(17) : error C0000: syntax error, unexpected '!', expecting "::" at token "!" </code></pre>
Tags
<c++><qt><opengl><glsl><vertex-shader>
Title
GLSL Shader Program Randomly Fails to Compile
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USinformer2000
UserOwnerUserId
1. USinformer2000
plurals
PostLinksPostIdRelatedPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POGLSL Shader Program Randomly Fails to Compile
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTDownMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.