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Fix attribute a_position assignment for OpenGL vertex shader

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Signed-off-by: S. Kozyr <s.trump@gmail.com>
This commit is contained in:
Sergiy Kozyr 2024-12-03 10:41:01 +02:00 • committed by Alexander Borsuk
parent 4d0aad72bd
commit 1caf64e315
1 changed files with 5 additions and 4 deletions
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9
qt/qt_common/map_widget.cpp
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@ -267,6 +267,10 @@ void MapWidget::Build()
QVector4D(-1.0, -1.0, 0.0, 0.0),
QVector4D(1.0, -1.0, 1.0, 0.0)};
m_vbo->allocate(static_cast<void*>(vertices), sizeof(vertices));
QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
f->glEnableVertexAttribArray(0);
f->glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), nullptr);
m_vbo->release();
m_program->release();
m_vao->release();
@ -420,10 +424,7 @@ void MapWidget::paintGL()
int const samplerSizeLocation = m_program->uniformLocation("u_samplerSize");
m_program->setUniformValue(samplerSizeLocation, samplerSize);
m_program->enableAttributeArray("a_position");
m_program->setAttributeBuffer("a_position", GL_FLOAT, 0, 4, 0);
funcs->glClearColor(0.0, 0.0, 0.0, 1.0);
funcs->glClearColor(0.5, 0.5, 0.5, 1.0);
funcs->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
funcs->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);