X-Git-Url: http://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=shapes.hpp;fp=shapes.hpp;h=69520aabdff32ce536db654250a233e0bd39e202;hp=0000000000000000000000000000000000000000;hb=c44e69ec78367fb2957324026894aef970f2481a;hpb=85f8f7278f24fe73fef1a19174376b155319072f

diff --git a/shapes.hpp b/shapes.hpp
new file mode 100644
index 0000000..69520aa
--- /dev/null
+++ b/shapes.hpp
@@ -0,0 +1,84 @@
+#include <array>
+#define GLM_FORCE_PURE
+#include <glm/glm.hpp>
+
+using namespace std;
+
+constexpr array<glm::vec3, 6> quadToTriangles(const array<glm::vec3, 4> quads) {
+	return {
+		quads[0],
+		quads[1],
+		quads[2],
+		quads[2],
+		quads[3],
+		quads[0]
+	};
+}
+
+constexpr const glm::vec3 foo() {
+	constexpr glm::vec3 foo(1,2,3);
+	return foo;
+}
+
+constexpr array<glm::vec3, 36> cube() {
+	int i = 0;
+	array<glm::vec3, 36> vertices;
+	
+	const array<glm::vec3, 4> front = {
+		glm::vec3(1, -1, -1),
+		glm::vec3(-1, -1, -1),
+		glm::vec3(-1, 1, -1),
+		glm::vec3(1, 1, -1)
+	};
+	
+	for (auto v: quadToTriangles(front))
+		vertices[i++] = v;
+
+	const array<glm::vec3, 4> back = {
+		glm::vec3(1, 1, 1),
+		glm::vec3(-1, 1, 1),
+		glm::vec3(-1, -1, 1),
+		glm::vec3(1, -1, 1)
+	};
+	for (auto v: quadToTriangles(back))
+		vertices[i++] = v;
+
+
+	const array<glm::vec3, 4> top = {
+		glm::vec3(1, 1, -1),
+		glm::vec3(-1, 1, -1),
+		glm::vec3(-1, 1, 1),
+		glm::vec3(1, 1, 1)
+	};
+	for (auto v: quadToTriangles(top))
+		vertices[i++] = v;
+
+	const array<glm::vec3, 4> bottom = {
+		glm::vec3(1, -1, 1),
+		glm::vec3(-1, -1, 1),
+		glm::vec3(-1, -1, -1),
+		glm::vec3(1, -1, -1)
+	};
+	for (auto v: quadToTriangles(bottom))
+		vertices[i++] = v;
+
+	const array<glm::vec3, 4> left = {
+		glm::vec3(-1, 1, 1),
+		glm::vec3(-1, 1, -1),
+		glm::vec3(-1, -1, -1),
+		glm::vec3(-1, -1, 1)
+	};
+	for (auto v: quadToTriangles(left))
+		vertices[i++] = v;
+
+	const array<glm::vec3, 4> right = {
+		glm::vec3(1, 1, -1),
+		glm::vec3(1, 1, 1),
+		glm::vec3(1, -1, 1),
+		glm::vec3(1, -1, -1)
+	};
+	for (auto v: quadToTriangles(right))
+		vertices[i++] = v;
+
+	return vertices;
+}