chore: Initial commit

src/main.cpp

@@ -0,0 +1,168 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <vector>
+
+#include <raylib.h>
+
+Mesh gen_mesh();
+void draw_custom();
+
+int main(int argc, char *argv[])
+{
+	(void)argc; (void)argv;
+
+	InitWindow(600, 400, "ecogame");
+
+	Camera3D camera = {
+		.position = { 1, 2, 3 },
+		.target = { 0, .5, 0 },
+		.up = { 0, 1, 0 },
+		.fovy = 80,
+		.projection = CAMERA_PERSPECTIVE,
+	};
+
+	Mesh mesh = gen_mesh();
+	Model model = LoadModelFromMesh(mesh);
+
+	while (!WindowShouldClose())
+	{
+		BeginDrawing();
+		ClearBackground({ 16, 16, 16, 255 });
+
+		BeginMode3D(camera);
+
+		DrawGrid(10, 2);
+		//DrawSphere({}, .5, GREEN);
+		//DrawModelWires(model, {}, 1, RED);
+		draw_custom();
+
+		EndMode3D();
+		EndDrawing();
+	}
+
+	CloseWindow();
+
+	return 0;
+}
+
+typedef struct vec2fp
+{
+	float x, y;
+} __attribute__((packed)) vec2fp;
+
+typedef struct vec3fp
+{
+	float x, y, z;
+} __attribute__((packed)) vec3fp;
+
+typedef struct triangle
+{
+	uint16_t a, b, c;
+} __attribute__((packed)) triangle_t;
+
+typedef struct body_def
+{
+	int segcount;
+	float spine_lengths[8];
+	int branch_hcount[8];
+	float branch_lenghts[8];
+} body_def_t;
+
+void draw_custom()
+{
+	body_def_t body = {};
+	body.segcount = 4;
+	body.spine_lengths[0] = .9;
+	body.spine_lengths[1] = .7;
+	body.spine_lengths[2] = .5;
+	body.branch_hcount[0] = 1;
+	body.branch_hcount[1] = 1;
+	body.branch_lenghts[0] = 1.2;
+	body.branch_lenghts[1] = .8;
+
+	//First point (head)
+	Vector3 prev, cur, branch;
+	std::vector<Vector3> prev_points, cur_points;
+	prev_points = std::vector<Vector3>();
+	cur_points = std::vector<Vector3>();
+	cur = { 0, .5, 0 };
+
+	DrawSphere(cur, 0.05, GREEN);
+	prev = cur;
+	prev_points.push_back(cur);
+
+	for (int i = 0; i < body.segcount; ++i)
+	{
+		cur.z += body.spine_lengths[i];
+		cur_points.push_back(cur);
+
+		DrawSphere(cur, 0.05, BLUE);
+		for (Vector3 p : prev_points)
+				DrawLine3D(cur, p, PINK);
+		DrawLine3D(cur, prev, BLUE);
+
+		for (int b = 0; b < body.branch_hcount[i]; ++b)
+		{
+			branch = cur;
+			branch.x += body.branch_lenghts[i];
+			cur_points.push_back(branch);
+
+			DrawSphere(branch, 0.05, RED);
+			for (Vector3 p : prev_points)
+				DrawLine3D(branch, p, PINK);
+			DrawLine3D(branch, cur, RED);
+
+			branch = cur;
+			branch.x -= body.branch_lenghts[i];
+			cur_points.push_back(branch);
+
+			DrawSphere(branch, 0.05, RED);
+			for (Vector3 p : prev_points)
+				DrawLine3D(branch, p, PINK);
+			DrawLine3D(branch, cur, RED);
+		}
+
+		prev = cur;
+
+		//Swap vectors
+		std::vector<Vector3> tmp = prev_points;
+		prev_points = cur_points;
+		cur_points = tmp;
+		cur_points.clear();
+	}
+}
+
+Mesh gen_mesh()
+{
+	Mesh mesh = {};
+
+	mesh.vertexCount = 4;
+	mesh.triangleCount = 2;
+
+	mesh.vertices = (float*)malloc(sizeof(float) * 3 * mesh.vertexCount);
+	mesh.normals = (float*)malloc(sizeof(float) * 3 * mesh.vertexCount);
+	mesh.indices = (uint16_t*)malloc(sizeof(uint16_t) * 3 * mesh.triangleCount);
+	vec3fp *verts = (vec3fp*)mesh.vertices;
+	vec3fp *normals = (vec3fp*)mesh.normals;
+	triangle_t *tris = (triangle_t*)mesh.indices;
+
+	verts[0] = { -1, .5, -1 };
+	verts[1] = { -1, .5, +1 };
+	verts[2] = { +1, .5, -1 };
+	verts[3] = { +1, .5, +1 };
+
+	normals[0] = { 0, 1, 0 };
+	normals[1] = { 0, 1, 0 };
+	normals[2] = { 0, 1, 0 };
+	normals[3] = { 0, 1, 0 };
+
+	tris[0] = { 0, 1, 2 };
+	tris[1] = { 2, 1, 3 };
+
+	UploadMesh(&mesh, false);
+
+	return mesh;
+}