using Raylib;
using static Raylib.Raylib;
using static Raylib.CameraType;
using static Raylib.CameraMode;
using static Raylib.TexmapIndex;
public partial class models_mesh_picking
{
/*******************************************************************************************
*
* raylib [models] example - Mesh picking in 3d mode, ground plane, triangle, mesh
*
* This example has been created using raylib 1.7 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2015 Ramon Santamaria (@raysan5)
* Example contributed by Joel Davis (@joeld42)
*
********************************************************************************************/
public const float FLT_MAX = 3.40282347E+38F;
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [models] example - mesh picking");
// Define the camera to look into our 3d world
Camera3D camera;
camera.position = new Vector3( 20.0f, 20.0f, 20.0f ); // Camera3D position
camera.target = new Vector3( 0.0f, 8.0f, 0.0f ); // Camera3D looking at point
camera.up = new Vector3( 0.0f, 1.6f, 0.0f ); // Camera3D up vector (rotation towards target)
camera.fovy = 45.0f; // Camera3D field-of-view Y
camera.type = CAMERA_PERSPECTIVE; // Camera3D mode type
Ray ray; // Picking ray
Model tower = LoadModel("resources/models/turret.obj"); // Load OBJ model
Texture2D texture = LoadTexture("resources/models/turret_diffuse.png"); // Load model texture
tower.material.maps[(int)MAP_ALBEDO].texture = texture; // Set model diffuse texture
Vector3 towerPos = new Vector3( 0.0f, 0.0f, 0.0f ); // Set model position
BoundingBox towerBBox = MeshBoundingBox(tower.mesh); // Get mesh bounding box
bool hitMeshBBox = false;
bool hitTriangle = false;
// Test triangle
Vector3 ta = new Vector3( -25.0f, 0.5f, 0.0f );
Vector3 tb = new Vector3( -4.0f, 2.5f, 1.0f );
Vector3 tc = new Vector3( -8.0f, 6.5f, 0.0f );
Vector3 bary = new Vector3( 0.0f, 0.0f, 0.0f );
SetCameraMode(camera, CameraMode.CAMERA_FREE); // Set a free camera mode
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//----------------------------------------------------------------------------------
// Main game loop
//--------------------------------------------------------------------------------------
while (!WindowShouldClose()) // Detect window close button or ESC key
{
//----------------------------------------------------------------------------------
// Update
//----------------------------------------------------------------------------------
UpdateCamera(ref camera); // Update camera
// Display information about closest hit
RayHitInfo nearestHit = new RayHitInfo();
string hitObjectName = "None";
nearestHit.distance = FLT_MAX;
nearestHit.hit = false;
Color cursorColor = WHITE;
// Get ray and test against ground, triangle, and mesh
ray = GetMouseRay(GetMousePosition(), camera);
// Check ray collision aginst ground plane
RayHitInfo groundHitInfo = GetCollisionRayGround(ray, 0.0f);
if ((groundHitInfo.hit) && (groundHitInfo.distance < nearestHit.distance))
{
nearestHit = groundHitInfo;
cursorColor = GREEN;
hitObjectName = "Ground";
}
// Check ray collision against test triangle
RayHitInfo triHitInfo = GetCollisionRayTriangle(ray, ta, tb, tc);
if ((triHitInfo.hit) && (triHitInfo.distance < nearestHit.distance))
{
nearestHit = triHitInfo;
cursorColor = PURPLE;
hitObjectName = "Triangle";
bary = Vector3Barycenter(nearestHit.position, ta, tb, tc);
hitTriangle = true;
}
else hitTriangle = false;
RayHitInfo meshHitInfo;
// Check ray collision against bounding box first, before trying the full ray-mesh test
if (CheckCollisionRayBox(ray, towerBBox))
{
hitMeshBBox = true;
// Check ray collision against model
// NOTE: It considers model.transform matrix!
meshHitInfo = GetCollisionRayModel(ray, ref tower);
if ((meshHitInfo.hit) && (meshHitInfo.distance < nearestHit.distance))
{
nearestHit = meshHitInfo;
cursorColor = ORANGE;
hitObjectName = "Mesh";
}
} hitMeshBBox = false;
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
BeginMode3D(camera);
// Draw the tower
// WARNING: If scale is different than 1.0f,
// not considered by GetCollisionRayModel()
DrawModel(tower, towerPos, 1.0f, WHITE);
// Draw the test triangle
DrawLine3D(ta, tb, PURPLE);
DrawLine3D(tb, tc, PURPLE);
DrawLine3D(tc, ta, PURPLE);
// Draw the mesh bbox if we hit it
if (hitMeshBBox) DrawBoundingBox(towerBBox, LIME);
// If we hit something, draw the cursor at the hit point
if (nearestHit.hit)
{
DrawCube(nearestHit.position, 0.3f, 0.3f, 0.3f, cursorColor);
DrawCubeWires(nearestHit.position, 0.3f, 0.3f, 0.3f, RED);
Vector3 normalEnd;
normalEnd.x = nearestHit.position.x + nearestHit.normal.x;
normalEnd.y = nearestHit.position.y + nearestHit.normal.y;
normalEnd.z = nearestHit.position.z + nearestHit.normal.z;
DrawLine3D(nearestHit.position, normalEnd, RED);
}
DrawRay(ray, MAROON);
DrawGrid(10, 10.0f);
EndMode3D();
// Draw some debug GUI text
DrawText(string.Format("Hit Object: {0}", hitObjectName), 10, 50, 10, BLACK);
if (nearestHit.hit)
{
int ypos = 70;
var x = string.Format("Distance: {0:000.00}", nearestHit.distance);
DrawText(string.Format("Distance: {0:000.00}", nearestHit.distance), 10, ypos, 10, BLACK);
DrawText(string.Format("Hit Pos: {0:000.00} {1:000.00} {2:000.00}",
nearestHit.position.x,
nearestHit.position.y,
nearestHit.position.z), 10, ypos + 15, 10, BLACK);
DrawText(string.Format("Hit Norm: {0:000.00} {1:000.00} {2:000.00}",
nearestHit.normal.x,
nearestHit.normal.y,
nearestHit.normal.z), 10, ypos + 30, 10, BLACK);
if (hitTriangle) DrawText(string.Format("Barycenter:{0:000.00} {1:000.00} {2:000.00}", bary.x, bary.y, bary.z), 10, ypos + 45, 10, BLACK);
}
DrawText("Use Mouse to Move Camera", 10, 430, 10, GRAY);
DrawText("(c) Turret 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);
DrawFPS(10, 10);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadModel(tower); // Unload model
UnloadTexture(texture); // Unload texture
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
}