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Add 3D character model preview to character creation screen

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Render an animated M2 character model in the creation screen using a
dedicated CharacterRenderer with an offscreen FBO. Preview updates on
race/gender/appearance changes, supports mouse-drag rotation, and
composites skin, face, hair scalp, and underwear textures from
CharSections.dbc. Extracts getPlayerModelPath() to a shared free
function in game/character.
This commit is contained in:
Kelsi 2026-02-05 14:58:45 -08:00
parent 0ff34364b6
commit 6d22f4249f
6 changed files with 631 additions and 22 deletions
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155
src/ui/character_create_screen.cpp
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@ -1,4 +1,5 @@
#include "ui/character_create_screen.hpp"
#include "rendering/character_preview.hpp"
#include "game/game_handler.hpp"
#include <imgui.h>
#include <cstring>
@ -28,6 +29,8 @@ CharacterCreateScreen::CharacterCreateScreen() {
reset();
}
CharacterCreateScreen::~CharacterCreateScreen() = default;
void CharacterCreateScreen::reset() {
std::memset(nameBuffer, 0, sizeof(nameBuffer));
raceIndex = 0;
@ -41,6 +44,30 @@ void CharacterCreateScreen::reset() {
statusMessage.clear();
statusIsError = false;
updateAvailableClasses();
// Reset preview tracking to force model reload on next render
prevRaceIndex_ = -1;
prevGenderIndex_ = -1;
prevSkin_ = -1;
prevFace_ = -1;
prevHairStyle_ = -1;
prevHairColor_ = -1;
prevFacialHair_ = -1;
}
void CharacterCreateScreen::initializePreview(pipeline::AssetManager* am) {
if (!preview_) {
preview_ = std::make_unique<rendering::CharacterPreview>();
preview_->initialize(am);
}
// Force model reload
prevRaceIndex_ = -1;
}
void CharacterCreateScreen::update(float deltaTime) {
if (preview_) {
preview_->update(deltaTime);
}
}
void CharacterCreateScreen::setStatus(const std::string& msg, bool isError) {
@ -62,23 +89,98 @@ void CharacterCreateScreen::updateAvailableClasses() {
}
}
void CharacterCreateScreen::updatePreviewIfNeeded() {
if (!preview_) return;
bool changed = (raceIndex != prevRaceIndex_ ||
genderIndex != prevGenderIndex_ ||
skin != prevSkin_ ||
face != prevFace_ ||
hairStyle != prevHairStyle_ ||
hairColor != prevHairColor_ ||
facialHair != prevFacialHair_);
if (changed) {
preview_->loadCharacter(
allRaces[raceIndex],
static_cast<game::Gender>(genderIndex),
static_cast<uint8_t>(skin),
static_cast<uint8_t>(face),
static_cast<uint8_t>(hairStyle),
static_cast<uint8_t>(hairColor),
static_cast<uint8_t>(facialHair));
prevRaceIndex_ = raceIndex;
prevGenderIndex_ = genderIndex;
prevSkin_ = skin;
prevFace_ = face;
prevHairStyle_ = hairStyle;
prevHairColor_ = hairColor;
prevFacialHair_ = facialHair;
}
}
void CharacterCreateScreen::render(game::GameHandler& /*gameHandler*/) {
// Render the preview to FBO before the ImGui frame
if (preview_) {
updatePreviewIfNeeded();
preview_->render();
}
ImVec2 displaySize = ImGui::GetIO().DisplaySize;
ImVec2 winSize(600, 520);
ImGui::SetNextWindowSize(winSize, ImGuiCond_FirstUseEver);
ImGui::SetNextWindowPos(ImVec2((displaySize.x - winSize.x) * 0.5f,
(displaySize.y - winSize.y) * 0.5f),
ImGuiCond_FirstUseEver);
bool hasPreview = (preview_ && preview_->getTextureId() != 0);
float previewWidth = hasPreview ? 320.0f : 0.0f;
float controlsWidth = 540.0f;
float totalWidth = hasPreview ? (previewWidth + controlsWidth + 16.0f) : 600.0f;
float totalHeight = 580.0f;
ImGui::Begin("Create Character", nullptr, ImGuiWindowFlags_NoCollapse);
ImGui::SetNextWindowSize(ImVec2(totalWidth, totalHeight), ImGuiCond_Always);
ImGui::SetNextWindowPos(ImVec2((displaySize.x - totalWidth) * 0.5f,
(displaySize.y - totalHeight) * 0.5f),
ImGuiCond_Always);
ImGui::Text("Create Character");
ImGui::Separator();
ImGui::Spacing();
ImGui::Begin("Create Character", nullptr,
ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoResize);
if (hasPreview) {
// Left panel: 3D preview
ImGui::BeginChild("##preview_panel", ImVec2(previewWidth, -40.0f), false);
{
// Display the FBO texture (flip Y for OpenGL)
float imgW = previewWidth - 8.0f;
float imgH = imgW * (static_cast<float>(preview_->getHeight()) /
static_cast<float>(preview_->getWidth()));
if (imgH > totalHeight - 80.0f) {
imgH = totalHeight - 80.0f;
imgW = imgH * (static_cast<float>(preview_->getWidth()) /
static_cast<float>(preview_->getHeight()));
}
ImGui::Image(
static_cast<ImTextureID>(preview_->getTextureId()),
ImVec2(imgW, imgH),
ImVec2(0.0f, 1.0f), // UV top-left (flipped Y)
ImVec2(1.0f, 0.0f)); // UV bottom-right (flipped Y)
// Mouse drag rotation on the preview image
if (ImGui::IsItemHovered() && ImGui::IsMouseDragging(ImGuiMouseButton_Left)) {
float deltaX = ImGui::GetIO().MouseDelta.x;
preview_->rotate(deltaX * 0.5f);
}
ImGui::TextColored(ImVec4(0.5f, 0.5f, 0.5f, 1.0f), "Drag to rotate");
}
ImGui::EndChild();
ImGui::SameLine();
// Right panel: controls
ImGui::BeginChild("##controls_panel", ImVec2(0, -40.0f), false);
}
// Name input
ImGui::Text("Name:");
ImGui::SameLine(100);
ImGui::SameLine(80);
ImGui::SetNextItemWidth(200);
ImGui::InputText("##name", nameBuffer, sizeof(nameBuffer));
@ -86,8 +188,8 @@ void CharacterCreateScreen::render(game::GameHandler& /*gameHandler*/) {
// Race selection
ImGui::Text("Race:");
ImGui::SameLine(100);
ImGui::BeginGroup();
ImGui::Spacing();
ImGui::Indent(10.0f);
ImGui::TextColored(ImVec4(0.3f, 0.5f, 1.0f, 1.0f), "Alliance:");
ImGui::SameLine();
for (int i = 0; i < ALLIANCE_COUNT; ++i) {
@ -120,13 +222,13 @@ void CharacterCreateScreen::render(game::GameHandler& /*gameHandler*/) {
}
if (selected) ImGui::PopStyleColor();
}
ImGui::EndGroup();
ImGui::Unindent(10.0f);
ImGui::Spacing();
// Class selection
ImGui::Text("Class:");
ImGui::SameLine(100);
ImGui::SameLine(80);
if (!availableClasses.empty()) {
ImGui::BeginGroup();
for (int i = 0; i < static_cast<int>(availableClasses.size()); ++i) {
@ -145,7 +247,7 @@ void CharacterCreateScreen::render(game::GameHandler& /*gameHandler*/) {
// Gender
ImGui::Text("Gender:");
ImGui::SameLine(100);
ImGui::SameLine(80);
ImGui::RadioButton("Male", &genderIndex, 0);
ImGui::SameLine();
ImGui::RadioButton("Female", &genderIndex, 1);
@ -161,10 +263,13 @@ void CharacterCreateScreen::render(game::GameHandler& /*gameHandler*/) {
ImGui::Text("Appearance");
ImGui::Spacing();
auto slider = [](const char* label, int* val, int maxVal) {
float sliderWidth = hasPreview ? 180.0f : 200.0f;
float labelCol = hasPreview ? 100.0f : 120.0f;
auto slider = [&](const char* label, int* val, int maxVal) {
ImGui::Text("%s", label);
ImGui::SameLine(120);
ImGui::SetNextItemWidth(200);
ImGui::SameLine(labelCol);
ImGui::SetNextItemWidth(sliderWidth);
char id[32];
snprintf(id, sizeof(id), "##%s", label);
ImGui::SliderInt(id, val, 0, maxVal);
@ -176,18 +281,24 @@ void CharacterCreateScreen::render(game::GameHandler& /*gameHandler*/) {
slider("Hair Color", &hairColor, game::getMaxHairColor(currentRace, currentGender));
slider("Facial Feature", &facialHair, game::getMaxFacialFeature(currentRace, currentGender));
ImGui::Spacing();
ImGui::Separator();
ImGui::Spacing();
// Status message
if (!statusMessage.empty()) {
ImGui::Separator();
ImGui::Spacing();
ImVec4 color = statusIsError ? ImVec4(1.0f, 0.3f, 0.3f, 1.0f) : ImVec4(0.3f, 1.0f, 0.3f, 1.0f);
ImGui::TextColored(color, "%s", statusMessage.c_str());
ImGui::Spacing();
}
// Buttons
if (hasPreview) {
ImGui::EndChild(); // controls_panel
}
// Bottom buttons (outside children)
ImGui::Separator();
ImGui::Spacing();
if (ImGui::Button("Create", ImVec2(150, 35))) {
std::string name(nameBuffer);
if (name.empty()) {