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304 lines
11 KiB
C++
304 lines
11 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2017 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#include <modules/base/rendering/renderablesphericalgrid.h>
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#include <openspace/engine/configurationmanager.h>
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#include <openspace/engine/openspaceengine.h>
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#include <openspace/rendering/renderengine.h>
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#include <openspace/util/spicemanager.h>
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#include <openspace/util/updatestructures.h>
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#include <openspace/documentation/verifier.h>
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#include <ghoul/glm.h>
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#include <ghoul/opengl/programobject.h>
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#define _USE_MATH_DEFINES
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#include <math.h>
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namespace {
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static const openspace::properties::Property::PropertyInfo GridColorInfo = {
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"GridColor",
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"Grid Color",
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"This value determines the color of the grid lines that are rendered."
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};
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static const openspace::properties::Property::PropertyInfo GridMatrixInfo = {
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"GridMatrix",
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"Grid Matrix",
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"This value specifies the local transformation matrix that defines the "
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"orientation of this grid relative to the parent's rotation."
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};
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static const openspace::properties::Property::PropertyInfo SegmentsInfo = {
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"Segments",
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"Number of Segments",
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"This value specifies the number of segments that are used to render the "
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"surrounding sphere."
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};
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static const openspace::properties::Property::PropertyInfo LineWidthInfo = {
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"LineWidth",
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"Line Width",
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"This value specifies the line width of the spherical grid."
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};
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static const openspace::properties::Property::PropertyInfo RadiusInfo = {
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"Radius",
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"Radius",
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"This value specifies the radius of the grid."
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};
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} // namespace
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namespace openspace {
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documentation::Documentation RenderableSphericalGrid::Documentation() {
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using namespace documentation;
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return {
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"RenderableSphericalGrid",
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"base_renderable_sphericalgrid",
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{
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{
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GridMatrixInfo.identifier,
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new DoubleMatrix4x4Verifier,
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Optional::No,
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GridMatrixInfo.description
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},
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{
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GridColorInfo.identifier,
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new DoubleVector4Verifier,
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Optional::Yes,
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GridColorInfo.description
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},
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{
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SegmentsInfo.identifier,
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new IntVerifier,
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Optional::Yes,
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SegmentsInfo.description
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},
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{
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LineWidthInfo.identifier,
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new DoubleVerifier,
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Optional::Yes,
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LineWidthInfo.description
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},
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{
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RadiusInfo.identifier,
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new DoubleVerifier,
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Optional::Yes,
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RadiusInfo.description
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}
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}
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};
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}
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RenderableSphericalGrid::RenderableSphericalGrid(const ghoul::Dictionary& dictionary)
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: Renderable(dictionary)
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, _gridProgram(nullptr)
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, _gridMatrix(GridMatrixInfo, glm::mat4(1.f))
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, _gridColor(
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GridColorInfo,
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glm::vec4(0.5f, 0.5, 0.5f, 1.f),
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glm::vec4(0.f),
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glm::vec4(1.f)
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)
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, _segments(SegmentsInfo, 36, 4, 10000)
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, _lineWidth(LineWidthInfo, 0.5f, 0.f, 20.f)
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, _radius(RadiusInfo, 1e20f, 1.f, 1e35f)
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, _vaoID(0)
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, _vBufferID(0)
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, _iBufferID(0)
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, _mode(GL_LINES)
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{
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documentation::testSpecificationAndThrow(
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Documentation(),
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dictionary,
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"RenderableSphericalGrid"
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);
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_gridMatrix = dictionary.value<glm::dmat4>(GridMatrixInfo.identifier);
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addProperty(_gridMatrix);
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if (dictionary.hasKey(GridColorInfo.identifier)) {
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_gridColor = dictionary.value<glm::vec4>(GridColorInfo.identifier);
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}
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_gridColor.setViewOption(properties::Property::ViewOptions::Color);
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addProperty(_gridColor);
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if (dictionary.hasKey(SegmentsInfo.identifier)) {
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_segments = static_cast<int>(dictionary.value<double>(SegmentsInfo.identifier));
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}
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//addProperty(_segments);
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if (dictionary.hasKey(LineWidthInfo.identifier)) {
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_lineWidth = static_cast<float>(
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dictionary.value<double>(LineWidthInfo.identifier)
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);
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}
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addProperty(_lineWidth);
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if (dictionary.hasKey(RadiusInfo.identifier)) {
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_radius = static_cast<float>(
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dictionary.value<double>(RadiusInfo.identifier)
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);
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}
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_isize = int(6 * _segments * _segments);
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_vsize = int((_segments + 1) * (_segments + 1));
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_varray.resize(_vsize);
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_iarray.resize(_isize);
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int nr = 0;
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const float fsegments = static_cast<float>(_segments);
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const float r = _radius;
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for (int nSegment = 0; nSegment <= _segments; ++nSegment) {
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// define an extra vertex around the y-axis due to texture mapping
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for (int j = 0; j <= _segments; j++) {
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const float fi = static_cast<float>(nSegment);
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const float fj = static_cast<float>(j);
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// inclination angle (north to south)
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const float theta = fi * float(M_PI) / fsegments*2.f; // 0 -> PI
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// azimuth angle (east to west)
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const float phi = fj * float(M_PI) * 2.0f / fsegments; // 0 -> 2*PI
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const float x = r * sin(phi) * sin(theta); //
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const float y = r * cos(theta); // up
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const float z = r * cos(phi) * sin(theta); //
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glm::vec3 normal = glm::vec3(x, y, z);
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if (!(x == 0.f && y == 0.f && z == 0.f))
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normal = glm::normalize(normal);
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//const float t1 = fj / fsegments;
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const float t2 = fi / fsegments;
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glm::vec4 tmp (x, y, z, 1);
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glm::mat4 rot = glm::rotate(glm::mat4(1), static_cast<float>(M_PI_2), glm::vec3(1, 0, 0));
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tmp = glm::vec4(_gridMatrix.value() * glm::dmat4(rot) * glm::dvec4(tmp));
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for (int i = 0; i < 3; i++){
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_varray[nr].location[i] = tmp[i];
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}
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++nr;
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}
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}
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nr = 0;
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// define indices for all triangles
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for (int i = 1; i <= _segments; ++i) {
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for (int j = 0; j < _segments; ++j) {
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const int t = _segments + 1;
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_iarray[nr] = t * (i - 1) + j + 0; ++nr;
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_iarray[nr] = t * (i + 0) + j + 0; ++nr;
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_iarray[nr] = t * (i + 0) + j + 1; ++nr;
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_iarray[nr] = t * (i - 1) + j + 1; ++nr;
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_iarray[nr] = t * (i - 1) + j + 0; ++nr;
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}
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}
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}
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RenderableSphericalGrid::~RenderableSphericalGrid() {}
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bool RenderableSphericalGrid::isReady() const {
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bool ready = true;
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ready &= (_gridProgram != nullptr);
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return ready;
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}
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bool RenderableSphericalGrid::deinitialize() {
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glDeleteVertexArrays(1,&_vaoID);
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_vaoID = 0;
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glDeleteBuffers(1,&_vBufferID);
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_vBufferID = 0;
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glDeleteBuffers(1,&_iBufferID);
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_iBufferID = 0;
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return true;
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}
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bool RenderableSphericalGrid::initialize() {
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bool completeSuccess = true;
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_gridProgram = OsEng.renderEngine().buildRenderProgram(
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"GridProgram",
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"${MODULE_BASE}/shaders/grid_vs.glsl",
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"${MODULE_BASE}/shaders/grid_fs.glsl"
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);
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// Initialize and upload to graphics card
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glGenVertexArrays(1, &_vaoID);
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glGenBuffers(1, &_vBufferID);
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glGenBuffers(1, &_iBufferID);
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// First VAO setup
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glBindVertexArray(_vaoID);
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glBindBuffer(GL_ARRAY_BUFFER, _vBufferID);
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glBufferData(GL_ARRAY_BUFFER, _vsize * sizeof(Vertex), _varray.data(), GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex),
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reinterpret_cast<const GLvoid*>(offsetof(Vertex, location)));
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _iBufferID);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, _isize * sizeof(int), _iarray.data(), GL_STATIC_DRAW);
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glBindVertexArray(0);
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return completeSuccess;
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}
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void RenderableSphericalGrid::render(const RenderData& data, RendererTasks&){
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_gridProgram->activate();
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glm::dmat4 modelTransform =
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glm::translate(glm::dmat4(1.0), data.modelTransform.translation) * // Translation
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glm::dmat4(data.modelTransform.rotation) * // Spice rotation
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glm::dmat4(glm::scale(glm::dmat4(1.0), glm::dvec3(data.modelTransform.scale)));
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glm::dmat4 modelViewTransform = data.camera.combinedViewMatrix() * modelTransform;
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_gridProgram->setUniform("modelViewTransform", glm::mat4(modelViewTransform));
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_gridProgram->setUniform("projectionTransform", data.camera.projectionMatrix());
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_gridProgram->setUniform("gridColor", _gridColor);
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glLineWidth(_lineWidth);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glEnable(GL_BLEND);
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glEnable(GL_LINE_SMOOTH);
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glBindVertexArray(_vaoID);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _iBufferID);
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glDrawElements(_mode, _isize, GL_UNSIGNED_INT, 0);
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glBindVertexArray(0);
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_gridProgram->deactivate();
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}
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} // namespace openspace
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