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119 lines
4.6 KiB
C++
119 lines
4.6 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2018 *
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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/iswa/rendering/textureplane.h>
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#include <openspace/engine/openspaceengine.h>
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#include <ghoul/opengl/texture.h>
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#include <ghoul/opengl/textureunit.h>
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#include <ghoul/opengl/programobject.h>
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namespace openspace {
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TexturePlane::TexturePlane(const ghoul::Dictionary& dictionary)
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: TextureCygnet(dictionary)
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, _quad(0)
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, _vertexPositionBuffer(0)
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{
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_programName = "PlaneProgram";
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_vsPath = "${MODULE_ISWA}/shaders/textureplane_vs.glsl";
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_fsPath = "${MODULE_ISWA}/shaders/textureplane_fs.glsl";
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}
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TexturePlane::~TexturePlane(){}
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void TexturePlane::setUniforms(){
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ghoul::opengl::TextureUnit unit;
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unit.activate();
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_textures[0]->bind();
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_shader->setUniform("texture1", unit);
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_shader->setUniform("transparency", _alpha.value());
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}
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bool TexturePlane::createGeometry() {
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glGenVertexArrays(1, &_quad); // generate array
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glGenBuffers(1, &_vertexPositionBuffer); // generate buffer
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// ============================
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// GEOMETRY (quad)
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// ============================
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float s = _data->spatialScale.x;
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const GLfloat x = s*_data->scale.x/2.f;
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const GLfloat y = s*_data->scale.y/2.f;
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const GLfloat z = s*_data->scale.z/2.f;
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const GLfloat w = _data->spatialScale.w;
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const GLfloat vertex_data[] = { // square of two triangles (sigh)
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// x y z w s t
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-x, -y, -z, w, 0, 1,
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x, y, z, w, 1, 0,
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-x, ((x>0)?y:-y), z, w, 0, 0,
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-x, -y, -z, w, 0, 1,
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x, ((x>0)?-y:y), -z, w, 1, 1,
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x, y, z, w, 1, 0,
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};
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glBindVertexArray(_quad); // bind array
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glBindBuffer(GL_ARRAY_BUFFER, _vertexPositionBuffer); // bind buffer
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_data), vertex_data, GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(
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0,
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4,
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GL_FLOAT,
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GL_FALSE,
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sizeof(GLfloat) * 6,
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reinterpret_cast<void*>(0)
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);
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(
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1,
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2,
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GL_FLOAT,
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GL_FALSE,
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sizeof(GLfloat) * 6,
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reinterpret_cast<void*>(sizeof(GLfloat) * 4)
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);
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return true;
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}
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bool TexturePlane::destroyGeometry(){
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glDeleteVertexArrays(1, &_quad);
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_quad = 0;
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glDeleteBuffers(1, &_vertexPositionBuffer);
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_vertexPositionBuffer = 0;
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return true;
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}
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void TexturePlane::renderGeometry() const {
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glBindVertexArray(_quad);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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}
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} // namespace openspace
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