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#include "Renderer2d.h"
#include "WebglContext.h"
#include "MainLoop.h"
#include "Renderer2d.h"
#include "types.h"
#include "TreeShape.h"
#include "LeafParticleRender.h"
#include "Snowflake.h"
enum Theme {
Default = 0,
Autumn,
Winter
};
struct AutumnTheme {
TreeShape tree;
LeafParticleRender leafParticles;
void load(Renderer2d* renderer);
void update(float32 dtSeconds);
void render(Renderer2d* renderer);
void unload();
};
struct WinterTheme {
SnowflakeParticleRenderer spr;
void load(Renderer2d* renderer);
void update(float32 dtSeconds);
void render(Renderer2d* renderer);
void unload();
};
void load(Theme theme);
void unload();
void update(float32 dtSeconds, void* userData);
EM_BOOL selectNone(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
EM_BOOL selectAutumn(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
EM_BOOL selectWinter(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
WebglContext context;
Renderer2d renderer;
MainLoop mainLoop;
Theme activeTheme = Theme::Default;
AutumnTheme autumnTheme;
WinterTheme winterTheme;
int main() {
context.init("#theme_canvas");
emscripten_set_click_callback("#theme_button_default", NULL, false, selectNone);
emscripten_set_click_callback("#theme_button_autumn", NULL, false, selectAutumn);
emscripten_set_click_callback("#theme_button_winter", NULL, false, selectWinter);
return 0;
}
// -- Scene loading, updating, and unloading logic
void load(Theme theme) {
if (activeTheme == theme) {
printf("This theme is already active.\n");
return;
}
unload(); // Try and unload before we load, so that we start fresh
activeTheme = theme;
renderer.load(&context);
mainLoop.run(update);
switch (activeTheme) {
case Theme::Autumn:
autumnTheme.load(&renderer);
break;
case Theme::Winter:
winterTheme.load(&renderer);
break;
default:
break;
}
}
void update(float32 dtSeconds, void* userData) {
// -- Update
switch (activeTheme) {
case Theme::Autumn:
autumnTheme.update(dtSeconds);
break;
case Theme::Winter:
winterTheme.update(dtSeconds);
break;
default:
break;
}
// -- Render
renderer.render();
switch (activeTheme) {
case Theme::Autumn:
autumnTheme.render(&renderer);
break;
case Theme::Winter:
winterTheme.render(&renderer);
break;
default:
break;
}
}
void unload() {
switch (activeTheme) {
case Theme::Autumn:
autumnTheme.unload();
break;
case Theme::Winter:
winterTheme.unload();
break;
default:
break;
}
activeTheme = Theme::Default;
if (mainLoop.isRunning) {
mainLoop.stop();
renderer.unload();
}
}
// -- HTML5 callbacks
EM_BOOL selectNone(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData) {
printf("Default theme selected\n");
unload();
return true;
}
EM_BOOL selectAutumn(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData) {
printf("Autumn theme selected\n");
load(Theme::Autumn);
return true;
}
EM_BOOL selectWinter(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData) {
printf("Winter theme selected\n");
load(Theme::Winter);
return true;
}
// -- Autumn theme
void AutumnTheme::load(Renderer2d* renderer) {
renderer->clearColor = Vector4(252, 210, 153, 255).toNormalizedColor();
auto lr = tree.load(renderer);
leafParticles.load(renderer, &lr);
}
void AutumnTheme::update(float32 dtSeconds) {
tree.update(dtSeconds);
leafParticles.update(dtSeconds);
}
void AutumnTheme::render(Renderer2d* renderer) {
tree.render(renderer);
leafParticles.render(renderer);
}
void AutumnTheme::unload() {
tree.unload();
leafParticles.unload();
}
// -- Winter theme
void WinterTheme::load(Renderer2d* renderer) {
renderer->clearColor = Vector4(200, 229, 239, 255).toNormalizedColor();
SnowflakeLoadParameters lp;
lp.spawnIntervalSeconds = 0.05;
spr.load(lp, renderer);
}
void WinterTheme::update(float32 dtSeconds) {
spr.update(dtSeconds);
}
void WinterTheme::render(Renderer2d* renderer) {
spr.render(renderer);
}
void WinterTheme::unload() {
spr.unload();
}
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