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f7eff123bea64404b4a804a49a9c936300802f6a
JGL/main.cpp
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Fix alpha masking when using shader.
2025-04-18 12:00:51 -04:00

337 lines
12 KiB
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#include <JGL/JGL.h>
#include <ReWindow/types/Window.h>
#include <Colors.hpp>
#include <chrono>
#include <J3ML/LinearAlgebra/Vector2.hpp>
#include <JGL/logger/logger.h>
#include <J3ML/Geometry/AABB.hpp>
#include <ReWindow/Logger.h>
#include <JGL/types/VertexArray.h>
#include <JGL/types/Shader.h>
using J3ML::LinearAlgebra::Vector2;
using namespace JGL::Fonts;
using namespace JGL;
using JGL::Font;
float fps = 0.0f;
/// A draggable 2D point that highlights when moused over and when clicked.
class Gizmo
{
public:
Gizmo() {}
Gizmo(const Vector2& pos) : position(pos) {}
bool dragging = false;
bool hovered = false;
Vector2 position;
float range = 6.f;
float base_radius = 3.f;
float hover_radius = 6.f;
float drag_radius = 4.f;
Color4 base_color = Colors::Reds::Salmon;
Color4 hover_color = Colors::Reds::Firebrick;
Color4 drag_color = Colors::White;
float lerp_rate = 0.25f;
float text_scale = 1.f;
int text_size = 12;
void Grab() {
if (hovered)
dragging = true;
}
void Release() {
dragging = false;
}
void Update(const Vector2& mouse) {
if (dragging)
position = position.Lerp(mouse, lerp_rate);
hovered = mouse.Distance(position) < range;
}
void Draw() {
if (dragging)
J2D::DrawPoint(drag_color, position, drag_radius);
else if (hovered)
J2D::DrawPoint(hover_color, position, hover_radius);
else
J2D::DrawPoint(base_color, position, base_radius);
J2D::DrawString(Colors::White, std::format("{:.1f},{:.1f}", position.x, position.y), position.x, position.y, text_scale, text_size);
}
};
/// A 3D Camera Controller.
class Camera {
public:
Vector3 position = {0,0,0};
Vector3 angle = {0,0,0};
std::vector<GLfloat> lookAt(const Vector3& eye, const Vector3& center, const Vector3& up) {
Vector3 f = Vector3::Normalized((center - eye));
Vector3 upN = Vector3::Normalized(up);
Vector3 s = Vector3::Normalized(f.Cross(upN));
Vector3 u = Vector3::Normalized(s.Cross(f));
std::vector<GLfloat> result = {
s.x, u.x, -f.x, 0.0f,
s.y, u.y, -f.y, 0.0f,
s.z, u.z, -f.z, 0.0f,
-s.Dot(eye), -u.Dot(eye), f.Dot(eye), 1.0f
};
return result;
}
void render() {
glRotatef(angle.x,1.0f, 0.0f, 0.0f);
glRotatef(angle.y,0.0f, 1.0f, 0.0f);
glRotatef(angle.z,0.0f, 0.0f, 1.0f);
glMultMatrixf(lookAt({position.x, position.y, position.z}, {position.x, position.y, 100.f + position.z}, {0,1,0}).data());
}
};
Camera* camera;
using J3ML::LinearAlgebra::Matrix4x4;
struct point {
GLfloat x;
GLfloat y;
GLfloat s;
GLfloat t;
};
Gizmo a({250, 150});
Gizmo b({200, 250});
Gizmo c({350, 300});
Gizmo d({450, 250});
JGL::Font FreeSans;
Texture* image;
Texture* image_mask;
RenderTarget* j2d_render_target;
Shader* shader;
class JGLDemoWindow : public ReWindow::OpenGLWindow
{
public:
void initGL() {
camera = new Camera;
if (!JGL::Init({ GetSize().x, GetSize().y}, 75, 100))
Logger::Fatal("Initialization failed.");
// Load a custom font.
FreeSans = JGL::Font("assets/fonts/FreeSans.ttf");
glClearColor(0.f, 0.f, 0.f, 0.f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glDepthMask(GL_TRUE);
image = new Texture("assets/sprites/Re3D.png", FilteringMode::MIPMAP_NEAREST, JGL::SampleRate::X16);
image_mask = new Texture("assets/sprites/alpha_mask_2.png");
j2d_render_target = new RenderTarget({540, 500}, {0,0,0,0}, false,
SampleRate::NONE, FilteringMode::MIPMAP_NEAREST);
//Texture::MultiplyByAlphaMask(*image, *image_mask);
shader = new Shader(std::filesystem::path("assets/shader_programs/test_vertex.glsl"), std::filesystem::path("assets/shader_programs/test_fragment.glsl"));
}
EulerAngleXYZ textAngle = {0,0,0};
float fov = 90;
float pulse = 0;
float sprite_radians = 0;
bool fov_increasing = true;
void display() {
pulse += 20 * delta_time;
float dt = GetDeltaTime();
JGL::Update({ GetSize().x, GetSize().y });
if (fov_increasing)
fov += 0.025;
else
fov -= 0.050;
if (fov >= 120)
fov_increasing = false;
else if (fov <= 75)
fov_increasing = true;
//J3D::ChangeFOV(fov);
sprite_radians += 0.005;
textAngle.yaw += 1;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
camera->render();
// All 3D elements of the scene and JGL elements *must* be rendered before the 2D stuff
/* if rendering to screen space directly. */
auto test_light = PointLight({2,1,2}, {(u8) pulse,(u8) pulse,(u8) pulse, 255}, {(u8) pulse, (u8) pulse, (u8) pulse, 255}, {0,0,0}, 1, 0.1, 0.01);
// If a 3D object has transparency. The things you'd like to see through it must be drawn before.
J3D::Begin();
J3D::DrawLine(Colors::Red, {-0.33,-0.125,1}, {-1,-0.125,1});
J3D::DrawLine(Colors::Red, {-0.33,-0.125,1}, {-0.33,0.25,1});
J3D::DrawString(Colors::Red, "JGL Sample Text", {-0.33, -0.1, 1.0f}, 1.f, 32, FreeSans, textAngle, true);
//J3D::WireframeSphere(Colors::Green, {0,0,0.5f}, 0.25f, 1, 128, 128);
Sphere sphere = {{1,0, 0.5f}, 0.2125};
J3D::BatchWireframeRevoSphere(Colors::Green, &sphere, 1, 1, 8, 8, true);
J3D::RequiredLight(&test_light);
J3D::FillAABB(Colors::Whites::AliceBlue, {0,0,0.5f}, {0.05f, 0.05f, 0.05f});
J3D::WireframeAABB(Colors::Yellow, {0.5, 0, 0.5}, {0.125, 0.125, 0.125}, 1);
J3D::End();
J2D::Begin(j2d_render_target, shader, true);
J2D::FillRect(Colors::Blue, {0,52}, {100,100});
J2D::DrawSprite(image, {300, 400}, sprite_radians * 0.10f, {0.5,0.5}, {1, 1}, Colors::White);
J2D::DrawMirrorSprite(image, {400, 300}, Direction::Horizontal | Direction::Vertical, sprite_radians, {0.5,0.5}, {1, 1}, Colors::White);
J2D::DrawPartialSprite(image, Vector2(225, 300), Vector2(image->GetDimensions()) * 0.25, Vector2(image->GetDimensions()) * 0.75, sprite_radians, {0.5, 0.5}, {1,1}, Colors::White);
J2D::FillRect(Colors::Pinks::HotPink, {68, 120}, {32, 32});
J2D::FillGradientRect(Colors::Red, Colors::Blue, Direction::Diagonal_SWNE, {100,52}, {100,100});
J2D::FillRoundedRect(Colors::Red, {200, 52}, {100, 100}, 8, 8);
J2D::FillRoundedRect(Colors::Purples::BlueViolet, {300, 52}, {100, 100}, 8, 4);
J2D::FillCircle(Colors::White, {52, 204}, 50, 24);
J2D::OutlineCircle(Colors::White, {153, 204}, 50, 24);
J2D::FillChamferRect(Colors::Reds::LightSalmon, {150, 400}, {64, 64}, 5);
J2D::OutlineRoundedRect(Colors::Reds::LightCoral, {250, 350}, {128, 128}, 10, 2);
std::vector<Vector2> points = {{1,1}, {4,4}, {8,8}, {16,16}, {32,32}};
J2D::FillGradientTriangle(Color4(Colors::Red), Color4(Colors::Green), Color4(Colors::Blue), {{0, 275}, {0, 375}, {100, 375}});
J2D::OutlineTriangle(Colors::Blue, {{100, 275}, {0, 275}, {100, 375}});
J2D::DrawGradientLine(Colors::Red, Colors::Blue, {105, 375}, {200, 275}, 2);
auto result = Jupiteroid.MeasureString("Jupiteroid Font", 16);
J2D::DrawString(Colors::Green, "Jupteroid Font", 0.f, 0, 1.f, 16, Jupiteroid);
J2D::DrawString(Colors::White, "Position: " + std::to_string(camera->position.x) + " " + std::to_string(camera->position.y) + " " + std::to_string(camera->position.z), 0, 16, 1,16, Jupiteroid);
J2D::DrawString(Colors::White, "ViewAngle: " + std::to_string(camera->angle.x) + " " + std::to_string(camera->angle.y) + " " + std::to_string(camera->angle.z), 0, 33, 1,16, Jupiteroid);
J2D::DrawString(Colors::White, "Framerate: " + std::to_string((int) fps), 0, 48, 1, 16, Jupiteroid);
std::array<Vector2, 5> polygon = {Vector2(200, 400), {220, 420}, {220, 430}, {230, 410}, {200, 400}};
J2D::OutlinePolygon(Colors::White, polygon.data(), polygon.size());
J2D::DrawCubicBezierCurve(Colors::Blues::CornflowerBlue,
a.position,
b.position,
c.position,
d.position
, 20, 1.5f);
a.Draw();
b.Draw();
c.Draw();
d.Draw();
J2D::End();
J2D::Begin(nullptr, shader, true);
J2D::DrawRenderTarget(j2d_render_target, {0, 0});
J2D::DrawSprite(image, image_mask, {0, 0}, 0.25, {0.5, 0.5}, {1,1});
J2D::End();
}
void OnRefresh(float elapsed) override {
fps = GetRefreshRate();
if (IsKeyDown(Keys::RightArrow))
camera->angle.y += 45.f * elapsed;
if (IsKeyDown(Keys::LeftArrow))
camera->angle.y -= 45.f * elapsed;
if (IsKeyDown(Keys::UpArrow))
camera->angle.x -= 45.f * elapsed;
if (IsKeyDown(Keys::DownArrow))
camera->angle.x += 45.f * elapsed;
if (IsKeyDown(Keys::Space))
camera->position.y += 1.f * elapsed;
if (IsKeyDown(Keys::LeftShift))
camera->position.y -= 1.f * elapsed;
//This is wrong of course. Just for testing purposes.
if (IsKeyDown(Keys::W))
camera->position.z += 1.f * elapsed;
if (IsKeyDown(Keys::S))
camera->position.z -= 1.f * elapsed;
if (IsKeyDown(Keys::A))
camera->position.x += 1.f * elapsed;
if (IsKeyDown(Keys::D))
camera->position.x -= 1.f * elapsed;
auto mouse = GetMouseCoordinates();
a.Update({(float) mouse.x, (float) mouse.y});
b.Update({(float) mouse.x, (float) mouse.y});
c.Update({(float) mouse.x, (float) mouse.y});
d.Update({(float) mouse.x, (float) mouse.y});
display();
int glError = glGetError();
if (glError != GL_NO_ERROR)
std::cout << glError << std::endl;
SwapBuffers();
}
void OnMouseButtonDown(const ReWindow::MouseButtonDownEvent & ev) override
{
RWindow::OnMouseButtonDown(ev);
a.Grab();
b.Grab();
c.Grab();
d.Grab();
}
void OnMouseButtonUp(const ReWindow::MouseButtonUpEvent & ev) override
{
RWindow::OnMouseButtonUp(ev);
a.Release();
b.Release();
c.Release();
d.Release();
}
bool OnResizeRequest(const ReWindow::WindowResizeRequestEvent& e) override {return true;}
JGLDemoWindow(const std::string& title, int width, int height) : ReWindow::OpenGLWindow(title, width, height, 2, 1) {}
};
int main(int argc, char** argv) {
auto* window = new JGLDemoWindow("JGL Demo Window", 1280, 720);
if (!window->Open())
exit(-1);
window->initGL();
window->SetResizable(true);
window->SetVsyncEnabled(false);
std::ifstream file("assets/models/cube.amo");
if (!file.is_open())
return -1;
Shader::OnCompilationErrorMessage += [] (std::string type, std::string info) {
std::cout << type << ", " << info << std::endl;
};
/*
std::stringstream buffer;
buffer << file.rdbuf();
std::string file_text = buffer.str();
file.close();
std::cout << file_text << std::endl;
auto result = VertexArray::LoadAMO(file_text);
*/
//ReWindow::Logger::Error.EnableConsole(false);
//ReWindow::Logger::Warning.EnableConsole(false);
//ReWindow::Logger::Debug.EnableConsole(false);
while (window->IsAlive())
window->ManagedRefresh();
return 0;
}
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