examples

commit d4d0d98cea7a7f26e02da1cfa40935fd7fd3415b
parent ff494da64cb87734b2a98880e423546b093ab569
Author: Henry Wilson <henry@henryandlizzy.uk>
Date:   Mon,  9 May 2022 23:47:05 +0100

gl-asteroids: Add lives

Diffstat:
M
src/gl-asteroids.cpp
 | 
36
++++++++++++++++++++++++++++++++++--

1 file changed, 34 insertions(+), 2 deletions(-)
diff --git a/src/gl-asteroids.cpp b/src/gl-asteroids.cpp
@@ -90,7 +90,7 @@ struct visual
 	std::span<color const> cols;
 };
 
-coord const shipv[] = {{0, 2}, {1, -1}, {-1, -1},  {1,-1}, {.5,0}, {.5,0}};
+coord const shipv[] = {{0, 2}, {1, -1}, {-1, -1}};
 color const shipc[] = {{1,1,1}, {.5,.5,.5}};
 
 coord const flamev[3] = {{0, -2.5}, {.6, -.25}, {-.6, -.25}};
@@ -335,6 +335,8 @@ std::optional<powerup> powerups;
 physics ship_phys{{}, {}, 0.f, 0.f, .06f};
 bool up = false;
 
+int lives = 3;
+
 void draw_scene(float t)
 {
 	glClearColor(0,0,0,1);
@@ -362,6 +364,13 @@ void draw_scene(float t)
 	}
 	draw_wrapped(ship, ship_phys);
 
+	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+
+	for (int i = 0; i < lives-1; ++i)
+		draw(ship, {{.9f, -.9f + i * .15f}, {}, 0.f, 0.f, .04f});
+
+	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+
 	glfwSwapBuffers(w);
 	glfwPollEvents();
 }
@@ -625,9 +634,32 @@ int main(int argc, char* argv[])
 			}
 		}
 
-		if(any_of(rocks.begin(), rocks.end(), [](auto& r) { return is_colliding(ship_phys, r.phys); }))
+		for (auto r = rocks.begin(); r != rocks.end(); /**/)
 		{
+			if (!is_colliding(ship_phys, r->phys))
+			{
+				++r;
+				continue;
+			}
+
 			play_sample(bang);
+			lives--;
+
+			for (unsigned j = 0; j < 7; ++j)
+			{
+				static std::uniform_real_distribution<float> scale(0.005,0.025);
+				entity debris = *r;
+				debris.vis = &random_rock_visual();
+				debris.phys.vel.x += .3 * dis_p(gen);
+				debris.phys.vel.y += .3 * dis_p(gen);
+				debris.phys.scale = scale(gen);
+				particle::make_particle(debris, 1);
+			}
+			r = rocks.erase(r);
+		}
+
+		if (!lives)
+		{
 			using namespace std::chrono_literals;
 			auto timeout = std::chrono::steady_clock::now() + 1s;
 			score += t;