File size: 3,970 Bytes
7b7496d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | // Copyright (c) 2022, ETH Zurich and UNC Chapel Hill.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)
#include "ui/point_painter.h"
#include "util/opengl_utils.h"
namespace colmap {
PointPainter::PointPainter() : num_geoms_(0) {}
PointPainter::~PointPainter() {
vao_.destroy();
vbo_.destroy();
}
void PointPainter::Setup() {
vao_.destroy();
vbo_.destroy();
if (shader_program_.isLinked()) {
shader_program_.release();
shader_program_.removeAllShaders();
}
shader_program_.addShaderFromSourceFile(QOpenGLShader::Vertex,
":/shaders/points.v.glsl");
shader_program_.addShaderFromSourceFile(QOpenGLShader::Fragment,
":/shaders/points.f.glsl");
shader_program_.link();
shader_program_.bind();
vao_.create();
vbo_.create();
#if DEBUG
glDebugLog();
#endif
}
void PointPainter::Upload(const std::vector<PointPainter::Data>& data) {
num_geoms_ = data.size();
if (num_geoms_ == 0) {
return;
}
vao_.bind();
vbo_.bind();
// Upload data array to GPU
vbo_.setUsagePattern(QOpenGLBuffer::DynamicDraw);
vbo_.allocate(data.data(),
static_cast<int>(data.size() * sizeof(PointPainter::Data)));
// in_position
shader_program_.enableAttributeArray("a_position");
shader_program_.setAttributeBuffer("a_position", GL_FLOAT, 0, 3,
sizeof(PointPainter::Data));
// in_color
shader_program_.enableAttributeArray("a_color");
shader_program_.setAttributeBuffer("a_color", GL_FLOAT, 3 * sizeof(GLfloat),
4, sizeof(PointPainter::Data));
// Make sure they are not changed from the outside
vbo_.release();
vao_.release();
#if DEBUG
glDebugLog();
#endif
}
void PointPainter::Render(const QMatrix4x4& pmv_matrix,
const float point_size) {
if (num_geoms_ == 0) {
return;
}
shader_program_.bind();
vao_.bind();
shader_program_.setUniformValue("u_pmv_matrix", pmv_matrix);
shader_program_.setUniformValue("u_point_size", point_size);
QOpenGLFunctions* gl_funcs = QOpenGLContext::currentContext()->functions();
gl_funcs->glDrawArrays(GL_POINTS, 0, (GLsizei)num_geoms_);
// Make sure the VAO is not changed from the outside
vao_.release();
#if DEBUG
glDebugLog();
#endif
}
} // namespace colmap
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