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ericw-tools/lightpreview/glview.cpp

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/* Copyright (C) 2017 Eric Wasylishen
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
See file, 'COPYING', for details.
*/
#include "glview.h"
// #include <cstdio>
#include <cassert>
#include <tuple>
#include <QApplication>
#include <QImage>
#include <QMouseEvent>
#include <QWheelEvent>
#include <QKeyEvent>
#include <QTime>
#include <fmt/core.h>
#include <QOpenGLFramebufferObject>
#include <QOpenGLDebugLogger>
#include <QStandardPaths>
#include <QDateTime>
#include <common/bspfile.hh>
#include <common/bsputils.hh>
#include <common/bspinfo.hh>
#include <common/imglib.hh>
#include <light/light.hh>
GLView::GLView(QWidget *parent)
: QOpenGLWidget(parent),
m_keysPressed(0),
m_moveSpeed(1000),
m_displayAspect(1),
m_cameraOrigin(0, 0, 0),
m_cameraFwd(0, 1, 0),
m_vao(),
m_indexBuffer(QOpenGLBuffer::IndexBuffer)
{
setFocusPolicy(Qt::StrongFocus); // allow keyboard focus
}
GLView::~GLView()
{
makeCurrent();
delete m_program;
delete m_program_wireframe;
delete m_skybox_program;
m_vbo.destroy();
m_indexBuffer.destroy();
m_vao.destroy();
placeholder_texture.reset();
lightmap_texture.reset();
m_drawcalls.clear();
doneCurrent();
}
static const char *s_fragShader_Wireframe = R"(
#version 330 core
out vec4 color;
void main() {
color = vec4(1.0);
}
)";
static const char *s_vertShader_Wireframe = R"(
#version 330 core
layout (location = 0) in vec3 position;
uniform mat4 MVP;
void main() {
gl_Position = MVP * vec4(position, 1.0);
}
)";
static const char *s_fragShader = R"(
#version 330 core
in vec2 uv;
in vec2 lightmap_uv;
in vec3 normal;
flat in vec3 flat_color;
flat in uint styles;
out vec4 color;
uniform sampler2D texture_sampler;
uniform sampler2DArray lightmap_sampler;
uniform float opacity;
uniform bool alpha_test;
uniform bool lightmap_only;
uniform bool fullbright;
uniform bool drawnormals;
uniform bool drawflat;
uniform float style_scalars[256];
void main() {
if (drawnormals) {
// remap -1..+1 to 0..1
color = vec4((normal + vec3(1.0)) / vec3(2.0), opacity);
} else if (drawflat) {
color = vec4(flat_color, opacity);
} else {
vec3 texcolor = lightmap_only ? vec3(0.5) : texture(texture_sampler, uv).rgb;
if (!lightmap_only && alpha_test && texture(texture_sampler, uv).a < 0.1) {
discard;
}
vec3 lmcolor = fullbright ? vec3(0.5) : vec3(0);
if (!fullbright)
{
for (uint i = 0u; i < 32u; i += 8u)
{
uint style = (styles >> i) & 0xFFu;
if (style == 0xFFu)
break;
lmcolor += texture(lightmap_sampler, vec3(lightmap_uv, (float) style)).rgb * style_scalars[style];
}
}
// 2.0 for overbright
color = vec4(texcolor * lmcolor * 2.0, opacity);
}
}
)";
static const char *s_vertShader = R"(
#version 330 core
layout (location = 0) in vec3 position;
layout (location = 1) in vec2 vertex_uv;
layout (location = 2) in vec2 vertex_lightmap_uv;
layout (location = 3) in vec3 vertex_normal;
layout (location = 4) in vec3 vertex_flat_color;
layout (location = 5) in uint vertex_styles;
out vec2 uv;
out vec2 lightmap_uv;
out vec3 normal;
flat out vec3 flat_color;
flat out uint styles;
uniform mat4 MVP;
void main() {
gl_Position = MVP * vec4(position.x, position.y, position.z, 1.0);
uv = vertex_uv;
lightmap_uv = vertex_lightmap_uv;
normal = vertex_normal;
flat_color = vertex_flat_color;
styles = vertex_styles;
}
)";
static const char *s_skyboxFragShader = R"(
#version 330 core
in vec3 fragment_world_pos;
in vec2 lightmap_uv;
in vec3 normal;
flat in vec3 flat_color;
flat in uint styles;
out vec4 color;
uniform samplerCube texture_sampler;
uniform sampler2DArray lightmap_sampler;
uniform bool lightmap_only;
uniform bool fullbright;
uniform bool drawnormals;
uniform bool drawflat;
uniform float style_scalars[256];
uniform vec3 eye_origin;
void main() {
if (drawnormals) {
// remap -1..+1 to 0..1
color = vec4((normal + vec3(1.0)) / vec3(2.0), 1.0);
} else if (drawflat) {
color = vec4(flat_color, 1.0);
} else {
if (!fullbright && lightmap_only)
{
vec3 lmcolor = vec3(0.5);
for (uint i = 0u; i < 32u; i += 8u)
{
uint style = (styles >> i) & 0xFFu;
if (style == 0xFFu)
break;
lmcolor += texture(lightmap_sampler, vec3(lightmap_uv, (float) style)).rgb * style_scalars[style];
}
// 2.0 for overbright
color = vec4(lmcolor * 2.0, 1.0);
}
else
{
// cubemap case
vec3 dir = normalize(fragment_world_pos - eye_origin);
color = vec4(texture(texture_sampler, dir).rgb, 1.0);
}
}
}
)";
static const char *s_skyboxVertShader = R"(
#version 330 core
layout (location = 0) in vec3 position;
layout (location = 1) in vec2 vertex_uv;
layout (location = 2) in vec2 vertex_lightmap_uv;
layout (location = 3) in vec3 vertex_normal;
layout (location = 4) in vec3 vertex_flat_color;
layout (location = 5) in uint vertex_styles;
out vec3 fragment_world_pos;
out vec2 lightmap_uv;
out vec3 normal;
flat out vec3 flat_color;
flat out uint styles;
uniform mat4 MVP;
uniform vec3 eye_origin;
void main() {
gl_Position = MVP * vec4(position, 1.0);
fragment_world_pos = position;
lightmap_uv = vertex_lightmap_uv;
normal = vertex_normal;
flat_color = vertex_flat_color;
styles = vertex_styles;
}
)";
bool GLView::shouldLiveUpdate() const
{
if (m_keysPressed)
return true;
if (QApplication::mouseButtons())
return true;
return false;
}
void GLView::handleLoggedMessage(const QOpenGLDebugMessage &debugMessage)
{
#ifdef _DEBUG
if (debugMessage.type() == QOpenGLDebugMessage::ErrorType)
__debugbreak();
#endif
qDebug() << debugMessage.message();
}
void GLView::initializeGL()
{
initializeOpenGLFunctions();
QOpenGLContext *ctx = QOpenGLContext::currentContext();
QOpenGLDebugLogger *logger = new QOpenGLDebugLogger(this);
logger->initialize(); // initializes in the current context, i.e. ctx
connect(logger, &QOpenGLDebugLogger::messageLogged, this, &GLView::handleLoggedMessage);
logger->startLogging(QOpenGLDebugLogger::SynchronousLogging);
// set up shader
m_program = new QOpenGLShaderProgram();
m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, s_vertShader);
m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, s_fragShader);
assert(m_program->link());
m_skybox_program = new QOpenGLShaderProgram();
m_skybox_program->addShaderFromSourceCode(QOpenGLShader::Vertex, s_skyboxVertShader);
m_skybox_program->addShaderFromSourceCode(QOpenGLShader::Fragment, s_skyboxFragShader);
assert(m_skybox_program->link());
m_program_wireframe = new QOpenGLShaderProgram();
m_program_wireframe->addShaderFromSourceCode(QOpenGLShader::Vertex, s_vertShader_Wireframe);
m_program_wireframe->addShaderFromSourceCode(QOpenGLShader::Fragment, s_fragShader_Wireframe);
assert(m_program_wireframe->link());
m_program->bind();
m_program_mvp_location = m_program->uniformLocation("MVP");
m_program_texture_sampler_location = m_program->uniformLocation("texture_sampler");
m_program_lightmap_sampler_location = m_program->uniformLocation("lightmap_sampler");
m_program_opacity_location = m_program->uniformLocation("opacity");
m_program_alpha_test_location = m_program->uniformLocation("alpha_test");
m_program_lightmap_only_location = m_program->uniformLocation("lightmap_only");
m_program_fullbright_location = m_program->uniformLocation("fullbright");
m_program_drawnormals_location = m_program->uniformLocation("drawnormals");
m_program_drawflat_location = m_program->uniformLocation("drawflat");
m_program_style_scalars_location = m_program->uniformLocation("style_scalars");
m_program->release();
m_skybox_program->bind();
m_skybox_program_mvp_location = m_skybox_program->uniformLocation("MVP");
m_skybox_program_eye_direction_location = m_skybox_program->uniformLocation("eye_origin");
m_skybox_program_texture_sampler_location = m_skybox_program->uniformLocation("texture_sampler");
m_skybox_program_lightmap_sampler_location = m_skybox_program->uniformLocation("lightmap_sampler");
m_skybox_program_opacity_location = m_skybox_program->uniformLocation("opacity");
m_skybox_program_lightmap_only_location = m_skybox_program->uniformLocation("lightmap_only");
m_skybox_program_fullbright_location = m_skybox_program->uniformLocation("fullbright");
m_skybox_program_drawnormals_location = m_skybox_program->uniformLocation("drawnormals");
m_skybox_program_drawflat_location = m_skybox_program->uniformLocation("drawflat");
m_skybox_program_style_scalars_location = m_skybox_program->uniformLocation("style_scalars");
m_skybox_program->release();
m_program_wireframe->bind();
m_program_wireframe_mvp_location = m_program_wireframe->uniformLocation("MVP");
m_program_wireframe->release();
m_vao.create();
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glFrontFace(GL_CW);
}
void GLView::paintGL()
{
// calculate frame time + update m_lastFrame
float duration_seconds;
const auto now = I_FloatTime();
if (m_lastFrame) {
duration_seconds = (now - *m_lastFrame).count();
} else {
duration_seconds = 0;
}
m_lastFrame = now;
// apply motion
applyMouseMotion();
applyFlyMovement(duration_seconds);
// draw
glClearColor(0.1, 0.1, 0.1, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
QMatrix4x4 modelMatrix;
QMatrix4x4 viewMatrix;
QMatrix4x4 projectionMatrix;
projectionMatrix.perspective(90, m_displayAspect, 1.0f, 1'000'000.0f);
viewMatrix.lookAt(m_cameraOrigin, m_cameraOrigin + m_cameraFwd, QVector3D(0, 0, 1));
QMatrix4x4 MVP = projectionMatrix * viewMatrix * modelMatrix;
// wireframe
if (m_showTris) {
m_program_wireframe->bind();
m_program_wireframe->setUniformValue(m_program_wireframe_mvp_location, MVP);
glEnable(GL_POLYGON_OFFSET_FILL);
glEnable(GL_POLYGON_OFFSET_LINE);
glPolygonOffset(-0.8, 1.0);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
for (auto &draw : m_drawcalls) {
glDrawElements(GL_TRIANGLES, draw.index_count, GL_UNSIGNED_INT,
reinterpret_cast<void *>(draw.first_index * sizeof(uint32_t)));
}
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glDisable(GL_POLYGON_OFFSET_FILL);
glDisable(GL_POLYGON_OFFSET_LINE);
m_program_wireframe->release();
}
QOpenGLShaderProgram *active_program = nullptr;
m_program->bind();
m_program->setUniformValue(m_program_mvp_location, MVP);
m_program->setUniformValue(m_program_texture_sampler_location, 0 /* texture unit */);
m_program->setUniformValue(m_program_lightmap_sampler_location, 1 /* texture unit */);
m_program->setUniformValue(m_program_opacity_location, 1.0f);
m_program->setUniformValue(m_program_alpha_test_location, false);
m_program->setUniformValue(m_program_lightmap_only_location, m_lighmapOnly);
m_program->setUniformValue(m_program_fullbright_location, m_fullbright);
m_program->setUniformValue(m_program_drawnormals_location, m_drawNormals);
m_program->setUniformValue(m_program_drawflat_location, m_drawFlat);
m_skybox_program->bind();
m_skybox_program->setUniformValue(m_skybox_program_mvp_location, MVP);
m_skybox_program->setUniformValue(m_skybox_program_eye_direction_location, m_cameraOrigin);
m_skybox_program->setUniformValue(m_skybox_program_texture_sampler_location, 0 /* texture unit */);
m_skybox_program->setUniformValue(m_skybox_program_lightmap_sampler_location, 1 /* texture unit */);
m_skybox_program->setUniformValue(m_skybox_program_opacity_location, 1.0f);
m_skybox_program->setUniformValue(m_skybox_program_lightmap_only_location, m_lighmapOnly);
m_skybox_program->setUniformValue(m_skybox_program_fullbright_location, m_fullbright);
m_skybox_program->setUniformValue(m_skybox_program_drawnormals_location, m_drawNormals);
m_skybox_program->setUniformValue(m_skybox_program_drawflat_location, m_drawFlat);
// opaque draws
for (auto &draw : m_drawcalls) {
if (draw.key.opacity != 1.0f)
continue;
if (active_program != draw.key.program) {
active_program = draw.key.program;
active_program->bind();
}
if (draw.key.alpha_test) {
m_program->setUniformValue(m_program_alpha_test_location, true);
} else {
m_program->setUniformValue(m_program_alpha_test_location, false);
}
draw.texture->bind(0 /* texture unit */);
lightmap_texture->bind(1 /* texture unit */);
QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
glDrawElements(GL_TRIANGLES, draw.index_count, GL_UNSIGNED_INT,
reinterpret_cast<void *>(draw.first_index * sizeof(uint32_t)));
}
// translucent draws
{
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
for (auto &draw : m_drawcalls) {
if (draw.key.opacity == 1.0f)
continue;
if (active_program != draw.key.program) {
active_program = draw.key.program;
active_program->bind();
}
if (draw.key.alpha_test) {
m_program->setUniformValue(m_program_alpha_test_location, true);
} else {
m_program->setUniformValue(m_program_alpha_test_location, false);
}
draw.texture->bind(0 /* texture unit */);
lightmap_texture->bind(1 /* texture unit */);
if (active_program == m_program) {
m_program->setUniformValue(m_program_opacity_location, draw.key.opacity);
} else {
m_skybox_program->setUniformValue(m_skybox_program_opacity_location, draw.key.opacity);
}
QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
glDrawElements(GL_TRIANGLES, draw.index_count, GL_UNSIGNED_INT,
reinterpret_cast<void *>(draw.first_index * sizeof(uint32_t)));
}
glDisable(GL_BLEND);
}
m_program->release();
if (shouldLiveUpdate()) {
update(); // schedule the next frame
} else {
qDebug() << "pausing anims..";
m_lastFrame = std::nullopt;
m_lastMouseDownPos = std::nullopt;
}
}
void GLView::setCamera(const qvec3d &origin, const qvec3d &fwd)
{
m_cameraOrigin = {(float)origin[0], (float)origin[1], (float)origin[2]};
m_cameraFwd = {(float)fwd[0], (float)fwd[1], (float)fwd[2]};
}
void GLView::setLighmapOnly(bool lighmapOnly)
{
m_lighmapOnly = lighmapOnly;
update();
}
void GLView::setFullbright(bool fullbright)
{
m_fullbright = fullbright;
update();
}
void GLView::setDrawNormals(bool drawnormals)
{
m_drawNormals = drawnormals;
update();
}
void GLView::setShowTris(bool showtris)
{
m_showTris = showtris;
update();
}
void GLView::setDrawFlat(bool drawflat)
{
m_drawFlat = drawflat;
update();
}
void GLView::setKeepOrigin(bool keeporigin)
{
m_keepOrigin = keeporigin;
}
void GLView::setLightStyleIntensity(int style_id, int intensity)
{
makeCurrent();
m_program->bind();
m_program->setUniformValue(m_program_style_scalars_location + style_id, intensity / 100.f);
m_program->release();
doneCurrent();
update();
}
void GLView::setMagFilter(QOpenGLTexture::Filter filter)
{
m_filter = filter;
if (placeholder_texture)
placeholder_texture->setMagnificationFilter(m_filter);
for (auto &dc : m_drawcalls) {
dc.texture->setMagnificationFilter(m_filter);
}
update();
}
void GLView::takeScreenshot(QString destPath, int w, int h)
{
// update aspect ratio
float backupDisplayAspect = m_displayAspect;
m_displayAspect = static_cast<float>(w) / static_cast<float>(h);
makeCurrent();
{
QOpenGLFramebufferObjectFormat format;
format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
format.setSamples(4);
QOpenGLFramebufferObject fbo(w, h, format);
assert(fbo.bind());
glViewport(0, 0, w, h);
paintGL();
QImage image = fbo.toImage();
image.save(destPath);
assert(fbo.release());
}
doneCurrent();
// restore aspect ratio
m_displayAspect = backupDisplayAspect;
update();
}
void GLView::renderBSP(const QString &file, const mbsp_t &bsp, const bspxentries_t &bspx,
const std::vector<entdict_t> &entities, const full_atlas_t &lightmap, const settings::common_settings &settings,
bool use_bspx_normals)
{
img::load_textures(&bsp, settings);
std::optional<bspxfacenormals> facenormals;
if (use_bspx_normals)
facenormals = BSPX_FaceNormals(bsp, bspx);
// NOTE: according to https://doc.qt.io/qt-6/qopenglwidget.html#resource-initialization-and-cleanup
// we can only do this after `initializeGL()` has run once.
makeCurrent();
// clear old data
placeholder_texture.reset();
lightmap_texture.reset();
m_drawcalls.clear();
m_vbo.bind();
m_vbo.allocate(0);
m_indexBuffer.bind();
m_indexBuffer.allocate(0);
int32_t highest_depth = 0;
for (auto &style : lightmap.style_to_lightmap_atlas) {
highest_depth = max(highest_depth, style.first);
}
// upload lightmap atlases
{
const auto &lm_tex = lightmap.style_to_lightmap_atlas.begin()->second;
lightmap_texture = std::make_shared<QOpenGLTexture>(QOpenGLTexture::Target2DArray);
lightmap_texture->setSize(lm_tex.width, lm_tex.height);
lightmap_texture->setLayers(highest_depth + 1);
lightmap_texture->setFormat(QOpenGLTexture::TextureFormat::RGBA8_UNorm);
lightmap_texture->setAutoMipMapGenerationEnabled(false);
lightmap_texture->setMagnificationFilter(QOpenGLTexture::Linear);
lightmap_texture->setMinificationFilter(QOpenGLTexture::Linear);
lightmap_texture->allocateStorage();
for (auto &style : lightmap.style_to_lightmap_atlas) {
lightmap_texture->setData(0, style.first, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
reinterpret_cast<const void *>(style.second.pixels.data()));
}
}
// upload placeholder texture
{
placeholder_texture = std::make_shared<QOpenGLTexture>(QOpenGLTexture::Target2D);
placeholder_texture->setSize(64, 64);
placeholder_texture->setFormat(QOpenGLTexture::TextureFormat::RGBA8_UNorm);
placeholder_texture->setAutoMipMapGenerationEnabled(true);
placeholder_texture->setMagnificationFilter(m_filter);
placeholder_texture->setMinificationFilter(QOpenGLTexture::Linear);
placeholder_texture->allocateStorage();
uint8_t *data = new uint8_t[64 * 64 * 4];
for (int y = 0; y < 64; ++y) {
for (int x = 0; x < 64; ++x) {
int i = ((y * 64) + x) * 4;
int v;
if ((x > 32) == (y > 32)) {
v = 64;
} else {
v = 32;
}
data[i] = v; // R
data[i + 1] = v; // G
data[i + 2] = v; // B
data[i + 3] = 0xff; // A
}
}
placeholder_texture->setData(
0, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8, reinterpret_cast<const void *>(data));
delete[] data;
}
struct face_payload
{
const mface_t *face;
qvec3d model_offset;
};
// collect faces grouped by material_key
std::map<material_key, std::vector<face_payload>> faces_by_material_key;
bool needs_skybox = false;
// collect entity bmodels
for (int mi = 0; mi < bsp.dmodels.size(); mi++) {
qvec3d origin{};
if (mi != 0) {
// find matching entity
std::string modelStr = fmt::format("*{}", mi);
bool found = false;
for (auto &ent : entities) {
if (ent.get("model") == modelStr) {
found = true;
ent.get_vector("origin", origin);
break;
}
}
if (!found)
continue;
}
auto &m = bsp.dmodels[mi];
for (int i = m.firstface; i < m.firstface + m.numfaces; ++i) {
auto &f = bsp.dfaces[i];
std::string t = Face_TextureName(&bsp, &f);
// FIXME: keep empty texture names?
if (t.empty())
continue;
if (f.numedges < 3)
continue;
const mtexinfo_t *texinfo = Face_Texinfo(&bsp, &f);
if (!texinfo)
continue; // FIXME: render as checkerboard?
QOpenGLShaderProgram *program = m_program;
// determine opacity
float opacity = 1.0f;
bool alpha_test = false;
if (bsp.loadversion->game->id == GAME_QUAKE_II) {
if (texinfo->flags.native & Q2_SURF_NODRAW) {
continue;
}
if (texinfo->flags.native & Q2_SURF_SKY) {
program = m_skybox_program;
needs_skybox = true;
} else {
if (texinfo->flags.native & Q2_SURF_TRANS33) {
opacity = 0.33f;
}
if (texinfo->flags.native & Q2_SURF_TRANS66) {
opacity = 0.66f;
}
if (texinfo->flags.native & Q2_SURF_ALPHATEST) {
alpha_test = true;
}
}
}
material_key k = {.program = program, .texname = t, .opacity = opacity, .alpha_test = alpha_test};
faces_by_material_key[k].push_back({.face = &f, .model_offset = origin});
}
}
std::shared_ptr<QOpenGLTexture> skybox_texture;
if (needs_skybox) {
// load skybox
std::string skybox = "unit1_"; // TODO: game-specific defaults
if (entities[0].has("sky")) {
skybox = entities[0].get("sky");
}
skybox_texture = std::make_shared<QOpenGLTexture>(QOpenGLTexture::TargetCubeMap);
{
QImage up_img;
{
auto up =
img::load_texture(fmt::format("env/{}up", skybox), false, bsp.loadversion->game, settings, true);
up_img = QImage((const uchar *)std::get<0>(up)->pixels.data(), std::get<0>(up)->width,
std::get<0>(up)->height, QImage::Format_RGB32);
up_img = std::move(up_img.transformed(QTransform().rotate(-90.0)).mirrored(false, true));
}
skybox_texture->setSize(up_img.width(), up_img.height());
skybox_texture->setFormat(QOpenGLTexture::TextureFormat::RGBA8_UNorm);
skybox_texture->setAutoMipMapGenerationEnabled(true);
skybox_texture->setMagnificationFilter(m_filter);
skybox_texture->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
skybox_texture->setMaximumAnisotropy(16);
skybox_texture->allocateStorage();
skybox_texture->setWrapMode(QOpenGLTexture::ClampToEdge);
skybox_texture->setData(0, 0, QOpenGLTexture::CubeMapPositiveZ, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
up_img.constBits(), nullptr);
}
{
QImage down_img;
{
auto down =
img::load_texture(fmt::format("env/{}dn", skybox), false, bsp.loadversion->game, settings, true);
down_img = QImage((const uchar *)std::get<0>(down)->pixels.data(), std::get<0>(down)->width,
std::get<0>(down)->height, QImage::Format_RGB32);
down_img = std::move(down_img.transformed(QTransform().rotate(90.0)).mirrored(true, false));
}
skybox_texture->setData(0, 0, QOpenGLTexture::CubeMapNegativeZ, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
down_img.constBits(), nullptr);
}
{
QImage left_img;
{
auto left =
img::load_texture(fmt::format("env/{}lf", skybox), false, bsp.loadversion->game, settings, true);
left_img = QImage((const uchar *)std::get<0>(left)->pixels.data(), std::get<0>(left)->width,
std::get<0>(left)->height, QImage::Format_RGB32);
left_img = std::move(left_img.transformed(QTransform().rotate(-90.0)).mirrored(true, false));
}
skybox_texture->setData(0, 0, QOpenGLTexture::CubeMapNegativeX, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
left_img.constBits(), nullptr);
}
{
QImage right_img;
{
auto right =
img::load_texture(fmt::format("env/{}rt", skybox), false, bsp.loadversion->game, settings, true);
right_img = QImage((const uchar *)std::get<0>(right)->pixels.data(), std::get<0>(right)->width,
std::get<0>(right)->height, QImage::Format_RGB32);
right_img = std::move(right_img.transformed(QTransform().rotate(90.0)).mirrored(true, false));
}
skybox_texture->setData(0, 0, QOpenGLTexture::CubeMapPositiveX, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
right_img.constBits(), nullptr);
}
{
QImage front_img;
{
auto front =
img::load_texture(fmt::format("env/{}ft", skybox), false, bsp.loadversion->game, settings, true);
front_img = QImage((const uchar *)std::get<0>(front)->pixels.data(), std::get<0>(front)->width,
std::get<0>(front)->height, QImage::Format_RGB32);
front_img = std::move(front_img.mirrored(true, false));
}
skybox_texture->setData(0, 0, QOpenGLTexture::CubeMapNegativeY, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
front_img.constBits(), nullptr);
}
{
QImage back_img;
{
auto back =
img::load_texture(fmt::format("env/{}bk", skybox), false, bsp.loadversion->game, settings, true);
back_img = QImage((const uchar *)std::get<0>(back)->pixels.data(), std::get<0>(back)->width,
std::get<0>(back)->height, QImage::Format_RGB32);
back_img = std::move(back_img.transformed(QTransform().rotate(-180.0)).mirrored(true, false));
}
skybox_texture->setData(0, 0, QOpenGLTexture::CubeMapPositiveY, QOpenGLTexture::RGBA, QOpenGLTexture::UInt8,
back_img.constBits(), nullptr);
}
}
// populate the vertex/index buffers
struct vertex_t
{
qvec3f pos;
qvec2f uv;
qvec2f lightmap_uv;
qvec3f normal;
qvec3f flat_color;
uint32_t styles;
};
std::vector<vertex_t> verts;
std::vector<uint32_t> indexBuffer;
for (const auto &[k, faces] : faces_by_material_key) {
// upload texture
// FIXME: we should have a separate lightpreview_options
auto *texture = img::find(k.texname);
std::shared_ptr<QOpenGLTexture> qtexture;
if (!texture) {
logging::print("warning, couldn't locate {}", k.texname);
qtexture = placeholder_texture;
}
if (!texture->width || !texture->height) {
logging::print("warning, empty texture {}", k.texname);
qtexture = placeholder_texture;
}
const size_t dc_first_index = indexBuffer.size();
if (k.program == m_skybox_program) {
qtexture = skybox_texture;
}
for (const auto &[f, model_offset] : faces) {
const int fnum = Face_GetNum(&bsp, f);
const auto plane_normal = Face_Normal(&bsp, f);
const qvec3f flat_color = qvec3f{Random(), Random(), Random()};
const size_t first_vertex_of_face = verts.size();
const auto lm_uvs = lightmap.facenum_to_lightmap_uvs.at(fnum);
// output a vertex for each vertex of the face
for (int j = 0; j < f->numedges; ++j) {
qvec3f pos = Face_PointAtIndex(&bsp, f, j);
qvec2f uv = Face_WorldToTexCoord(&bsp, f, pos);
if (qtexture) {
uv[0] *= (1.0 / qtexture->width());
uv[1] *= (1.0 / qtexture->height());
} else {
uv[0] *= (1.0 / texture->width);
uv[1] *= (1.0 / texture->height);
}
qvec2f lightmap_uv = lm_uvs.at(j);
qvec3f vertex_normal;
if (facenormals) {
auto normal_index = facenormals->per_face[fnum].per_vert[j].normal;
vertex_normal = facenormals->normals[normal_index];
} else {
vertex_normal = plane_normal;
}
verts.push_back({.pos = pos + model_offset,
.uv = uv,
.lightmap_uv = lightmap_uv,
.normal = vertex_normal,
.flat_color = flat_color,
.styles = (uint32_t)(f->styles[0]) | (uint32_t)(f->styles[1] << 8) |
(uint32_t)(f->styles[2] << 16) | (uint32_t)(f->styles[3] << 24)});
}
// output the vertex indices for this face
for (int j = 2; j < f->numedges; ++j) {
indexBuffer.push_back(first_vertex_of_face);
indexBuffer.push_back(first_vertex_of_face + j - 1);
indexBuffer.push_back(first_vertex_of_face + j);
}
}
if (!qtexture) {
qtexture = std::make_shared<QOpenGLTexture>(QOpenGLTexture::Target2D);
qtexture->setSize(texture->width, texture->height);
qtexture->setFormat(QOpenGLTexture::TextureFormat::RGBA8_UNorm);
qtexture->allocateStorage();
qtexture->setData(
QOpenGLTexture::RGBA, QOpenGLTexture::UInt8, reinterpret_cast<const void *>(texture->pixels.data()));
qtexture->setMaximumAnisotropy(16);
qtexture->setAutoMipMapGenerationEnabled(true);
qtexture->setMagnificationFilter(m_filter);
qtexture->setMinificationFilter(QOpenGLTexture::LinearMipMapLinear);
}
const size_t dc_index_count = indexBuffer.size() - dc_first_index;
drawcall_t dc = {
.key = k, .texture = std::move(qtexture), .first_index = dc_first_index, .index_count = dc_index_count};
m_drawcalls.push_back(std::move(dc));
}
QOpenGLVertexArrayObject::Binder vaoBinder(&m_vao);
// upload index buffer
m_indexBuffer.create();
m_indexBuffer.bind();
m_indexBuffer.allocate(indexBuffer.data(), indexBuffer.size() * sizeof(indexBuffer[0]));
// upload vertex buffer
m_vbo.create();
m_vbo.bind();
m_vbo.allocate(verts.data(), verts.size() * sizeof(verts[0]));
// positions
glEnableVertexAttribArray(0 /* attrib */);
glVertexAttribPointer(0 /* attrib */, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void *)offsetof(vertex_t, pos));
// texture uvs
glEnableVertexAttribArray(1 /* attrib */);
glVertexAttribPointer(1 /* attrib */, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void *)offsetof(vertex_t, uv));
// lightmap uvs
glEnableVertexAttribArray(2 /* attrib */);
glVertexAttribPointer(
2 /* attrib */, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void *)offsetof(vertex_t, lightmap_uv));
// normals
glEnableVertexAttribArray(3 /* attrib */);
glVertexAttribPointer(3 /* attrib */, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void *)offsetof(vertex_t, normal));
// flat shading color
glEnableVertexAttribArray(4 /* attrib */);
glVertexAttribPointer(
4 /* attrib */, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void *)offsetof(vertex_t, flat_color));
// styles
glEnableVertexAttribArray(5 /* attrib */);
glVertexAttribIPointer(5 /* attrib */, 1, GL_UNSIGNED_INT, sizeof(vertex_t), (void *)offsetof(vertex_t, styles));
// initialize style values
m_program->bind();
for (int i = 0; i < 256; i++) {
m_program->setUniformValue(m_program_style_scalars_location + i, 1.f);
}
m_program->release();
doneCurrent();
// schedule repaint
update();
}
void GLView::resizeGL(int width, int height)
{
m_displayAspect = static_cast<float>(width) / static_cast<float>(height);
}
void GLView::applyMouseMotion()
{
if (!(QApplication::mouseButtons() & Qt::RightButton)) {
m_lastMouseDownPos = std::nullopt;
return;
}
QPoint current_pos = QCursor::pos();
QPointF delta;
if (m_lastMouseDownPos) {
delta = current_pos - *m_lastMouseDownPos;
} else {
delta = QPointF(0, 0);
}
m_lastMouseDownPos = current_pos;
// handle mouse movement
float pitchDegrees = delta.y() * -0.2;
float yawDegrees = delta.x() * -0.2;
QMatrix4x4 mouseRotation;
mouseRotation.rotate(pitchDegrees, cameraRight());
mouseRotation.rotate(yawDegrees, QVector3D(0, 0, 1));
// now rotate m_cameraFwd and m_cameraUp by mouseRotation
m_cameraFwd = mouseRotation * m_cameraFwd;
}
static keys_t Qt_Key_To_keys_t(int key)
{
switch (key) {
case Qt::Key_W: return keys_t::up;
case Qt::Key_A: return keys_t::left;
case Qt::Key_S: return keys_t::down;
case Qt::Key_D: return keys_t::right;
case Qt::Key_Q: return keys_t::fly_down;
case Qt::Key_E: return keys_t::fly_up;
}
return keys_t::none;
}
void GLView::keyPressEvent(QKeyEvent *event)
{
keys_t key = Qt_Key_To_keys_t(event->key());
m_keysPressed |= static_cast<uint32_t>(key);
}
void GLView::keyReleaseEvent(QKeyEvent *event)
{
keys_t key = Qt_Key_To_keys_t(event->key());
m_keysPressed &= ~static_cast<uint32_t>(key);
}
void GLView::wheelEvent(QWheelEvent *event)
{
if (!(event->buttons() & Qt::RightButton))
return;
double delta = event->angleDelta().y();
m_moveSpeed += delta;
m_moveSpeed = clamp(m_moveSpeed, 10.0f, 5000.0f);
}
void GLView::mousePressEvent(QMouseEvent *event)
{
update();
}
void GLView::applyFlyMovement(float duration_seconds)
{
// qDebug() << "timer event: duration: " << duration_seconds;
const float distance = m_moveSpeed * duration_seconds;
const auto prevOrigin = m_cameraOrigin;
if (m_keysPressed & static_cast<uint32_t>(keys_t::up))
m_cameraOrigin += m_cameraFwd * distance;
if (m_keysPressed & static_cast<uint32_t>(keys_t::down))
m_cameraOrigin -= m_cameraFwd * distance;
if (m_keysPressed & static_cast<uint32_t>(keys_t::left))
m_cameraOrigin -= cameraRight() * distance;
if (m_keysPressed & static_cast<uint32_t>(keys_t::right))
m_cameraOrigin += cameraRight() * distance;
if (m_keysPressed & static_cast<uint32_t>(keys_t::fly_down))
m_cameraOrigin -= QVector3D(0, 0, 1) * distance;
if (m_keysPressed & static_cast<uint32_t>(keys_t::fly_up))
m_cameraOrigin += QVector3D(0, 0, 1) * distance;
if (prevOrigin != m_cameraOrigin) {
emit cameraMoved();
}
}
qvec3f GLView::cameraPosition() const
{
return qvec3f{m_cameraOrigin[0], m_cameraOrigin[1], m_cameraOrigin[2]};
}
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