git-svn-id: svn://db.shs.com.ru/libs@44 a8b55f48-bf90-11e4-a774-851b48703e85
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qglview/glrendererbase.cpp
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qglview/glrendererbase.cpp
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/*
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QGLView
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Copyright (C) 2012 Ivan Pelipenko peri4ko@gmail.com
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "glrendererbase.h"
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#include "globject.h"
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#include "qglview.h"
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GLRendererBase::GLRendererBase(QGLView * view_): view(*view_) {
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white_image = QImage(1, 1, QImage::Format_ARGB32);
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white_image.fill(0xFFFFFFFF);
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white_image_id = 0;
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}
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void GLRendererBase::setupLight(const Light & l, int inpass_index, int gl_index) {
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QVector3D lp = l.worldPos(), ld = (l.itransform_ * QVector4D(l.direction, 0.)).toVector3D().normalized();
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GLfloat pos[] = {0.f, 0.f, 0.f, 0.f};
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GLfloat dir[] = {0.f, 0.f, 0.f};
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GLfloat col[] = {0.f, 0.f, 0.f};
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pos[0] = l.light_type == Light::Directional ? -l.direction.x() : lp.x();
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pos[1] = l.light_type == Light::Directional ? -l.direction.y() : lp.y();
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pos[2] = l.light_type == Light::Directional ? -l.direction.z() : lp.z();
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pos[3] = l.light_type == Light::Directional ? 0. : 1.;
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dir[0] = ld.x();
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dir[1] = ld.y();
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dir[2] = ld.z();
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col[0] = l.visible_ ? l.color().redF() * l.intensity : 0.;
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col[1] = l.visible_ ? l.color().greenF() * l.intensity : 0.;
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col[2] = l.visible_ ? l.color().blueF() * l.intensity : 0.;
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glEnable(gl_index);
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//glLightfv(gl_index, GL_AMBIENT, ambient);
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glLightfv(gl_index, GL_DIFFUSE, col);
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glLightfv(gl_index, GL_SPECULAR, col);
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glLightfv(gl_index, GL_POSITION, pos);
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glLightf(gl_index, GL_CONSTANT_ATTENUATION, l.decay_const);
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glLightf(gl_index, GL_LINEAR_ATTENUATION, l.decay_linear);
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glLightf(gl_index, GL_QUADRATIC_ATTENUATION, l.decay_quadratic);
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if (l.light_type == Light::Cone) {
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glLightfv(gl_index, GL_SPOT_DIRECTION, dir);
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glLightf(gl_index, GL_SPOT_CUTOFF, l.angle_spread);
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glLightf(gl_index, GL_SPOT_EXPONENT, l.angle_decay_exp);
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} else {
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glLightf(gl_index, GL_SPOT_CUTOFF, 180.);
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}
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}
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void GLRendererBase::setupAmbientLight(const QColor & a, bool first_pass) {
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GLfloat ambient[] = {0.0f, 0.0f, 0.0f, 1.f};
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if (first_pass) {
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ambient[0] = view.ambientColor_.redF();
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ambient[1] = view.ambientColor_.greenF();
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ambient[2] = view.ambientColor_.blueF();
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}
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
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}
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void GLRendererBase::setupShadersLights(int lights_count) {
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/*foreach (QGLShaderProgram * i, view.shaders_ppl) {
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i->bind();
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i->setUniformValue("lightsCount", lights_count);
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i->setUniformValue("acc_light", lights_count > 0);
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//i->setUniformValue("mat", mvm);
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}*/
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}
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#define BIND_TEXTURE(ch, map) if (rp.prev_tex[ch] != mat.map.bitmap_id) { \
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rp.prev_tex[ch] = mat.map.bitmap_id; \
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glActiveTextureChannel(ch); glBindTexture(GL_TEXTURE_2D, mat.map.bitmap_id); \
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, view.anisotropicLevel_);}
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void GLRendererBase::setupTextures(GLObjectBase & o, GLRendererBase::RenderingParameters & rp, bool first_object) {
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if (first_object) {
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glReleaseTextures();
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return;
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}
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setupShadersTextures(o, rp);
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Material & mat(o.material_);
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if (rp.light) {
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if (o.accept_light) {if (!rp.prev_light) {glSetLightEnabled(true); rp.prev_light = true;}}
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else {if (rp.prev_light) {glSetLightEnabled(false); rp.prev_light = false;}}
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}
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if (rp.fog) {
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if (o.accept_fog) {if (!rp.prev_fog) {glSetFogEnabled(true); rp.prev_fog = true;}}
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else {if (rp.prev_fog) {glSetFogEnabled(false); rp.prev_fog = false;}}
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}
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if (rp.textures) {
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BIND_TEXTURE(0, map_diffuse);
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BIND_TEXTURE(1, map_bump);
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BIND_TEXTURE(2, map_relief);
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BIND_TEXTURE(3, map_self_illumination);
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BIND_TEXTURE(4, map_roughness);
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BIND_TEXTURE(5, map_specular);
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glActiveTextureChannel(0);
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}
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}
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#undef BIND_TEXTURE
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void GLRendererBase::setupLights(int pass, int lights_per_pass) {
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int light_start, light_end, lmax;
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light_start = pass * lights_per_pass;
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light_end = qMin<int>((pass + 1) * lights_per_pass, view.lights_.size());
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setupAmbientLight(view.ambientColor_, pass == 0);
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if (!view.lights_.isEmpty()) {
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setupShadersLights(light_end - light_start);
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for (int i = light_start; i < light_end; ++i)
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setupLight(*view.lights_[i], i - light_start, GL_LIGHT0 + i - light_start);
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lmax = light_start + 8;
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for (int i = light_end; i < lmax; ++i)
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glDisable(GL_LIGHT0 + i - light_start);
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} else {
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setupShadersLights(0);
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for (int i = 0; i < 8; ++i)
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glDisable(GL_LIGHT0 + i);
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}
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}
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void GLRendererBase::applyFilteringParameters() {
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if (view.linearFiltering_) {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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} else {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
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}
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, view.anisotropicLevel_);
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}
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void GLRendererBase::renderObjects(int pass, int light_pass, void * shaders, bool textures, bool light, bool fog) {
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RenderingParameters rp;
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rp.pass = pass;
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rp.light_pass = light_pass;
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rp.shaders = shaders;
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rp.textures = textures;
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rp.light = rp.prev_light = light;
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rp.fog = rp.prev_fog = fog;
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rp.view_matrix = getGLMatrix(GL_MODELVIEW_MATRIX);
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rp.proj_matrix = getGLMatrix(GL_PROJECTION_MATRIX);
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//qDebug() << "view:" << rp.view_matrix;
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for (int i = 0; i < 32; ++i) rp.prev_tex[i] = 0;
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setupTextures(view.objects_, rp, true);
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glSetLightEnabled(rp.prev_light);
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glSetFogEnabled(rp.prev_fog);
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glSetCapEnabled(GL_TEXTURE_2D, rp.textures);
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glSetCapEnabled(GL_BLEND, pass == GLObjectBase::Transparent);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glDisable(GL_TEXTURE_CUBE_MAP);
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glPushMatrix();
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renderSingleObject(view.objects_, rp);
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glPopMatrix();
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}
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void GLRendererBase::renderSingleObject(GLObjectBase & o, RenderingParameters & rp) {
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if (!o.isInit())
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o.init();
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if (!o.isTexturesLoaded())
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o.loadTextures();
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if (!o.visible_) return;
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if (rp.pass == o.pass_) {
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Material & mat(o.material_);
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QMatrix4x4 curview = rp.view_matrix * o.itransform_;
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setupTextures(o, rp, false);
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mat.apply((QGLShaderProgram*)rp.shaders);
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glSetPolygonMode(o.render_mode != GLObjectBase::View ? o.render_mode : (view.rmode != GLObjectBase::View ? view.rmode : GL_FILL));
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glLineWidth(o.line_width > 0. ? o.line_width : view.lineWidth_);
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glPointSize(o.line_width > 0. ? o.line_width : view.lineWidth_);
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o.update();
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if (o.pass_ == GLObjectBase::Transparent) {
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glActiveTextureChannel(3);
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if (mat.reflectivity > 0.) {
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glEnable(GL_TEXTURE_CUBE_MAP);
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if (!mat.map_reflection.isEmpty()) mat.map_reflection.bind();
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else glDisable(GL_TEXTURE_CUBE_MAP);
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} else glDisable(GL_TEXTURE_CUBE_MAP);
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if (rp.light_pass > 0) glDisable(GL_TEXTURE_CUBE_MAP);
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GLfloat gm[16], bc[4] = {mat.reflectivity, mat.reflectivity, mat.reflectivity, mat.reflectivity};
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
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glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE);
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glTexEnvi(GL_TEXTURE_ENV, GL_SRC2_RGB, GL_CONSTANT);
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glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_COLOR);
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glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, bc);
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glGetFloatv(GL_MODELVIEW_MATRIX, gm);
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glMatrixMode(GL_TEXTURE);
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glLoadTransposeMatrixf(gm);
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glScalef(-1., -1., -1.);
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glMatrixMode(GL_MODELVIEW);
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glActiveTextureChannel(0);
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}
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if (rp.shaders) {
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//qDebug() << o.name() << curview << curview.determinant();
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setUniformMatrices((QGLShaderProgram*)rp.shaders, rp.proj_matrix, curview);
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} else {
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glMatrixMode(GL_MODELVIEW);
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setGLMatrix(curview);
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}
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o.draw((QGLShaderProgram*)rp.shaders);
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}
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foreach (GLObjectBase * i, o.children_)
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renderSingleObject(*i, rp);
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}
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