Added webpage

Moved from @raysan5/raylib/docs

1 files changed, 238 insertions, 0 deletions

diff --git a/examples/web/models/models_mesh_picking.c b/examples/web/models/models_mesh_picking.c
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+++ b/examples/web/models/models_mesh_picking.c
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+/*******************************************************************************************
+*
+*   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)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include "raymath.h"
+
+#define FLT_MAX     3.40282347E+38F     // Maximum value of a float, defined in <float.h>
+
+#if defined(PLATFORM_WEB)
+    #include <emscripten/emscripten.h>
+#endif
+
+//----------------------------------------------------------------------------------
+// Global Variables Definition
+//----------------------------------------------------------------------------------
+const int screenWidth = 800;
+const int screenHeight = 450;
+
+Camera camera;
+    
+Vector3 cubePosition = { 0.0f, 1.0f, 0.0f };
+Vector3 cubeSize = { 2.0f, 2.0f, 2.0f };
+
+Ray ray;        // Picking line ray
+
+Model tower;
+Texture2D texture;
+
+Vector3 towerPos = { 0.0f, 0.0f, 0.0f };
+BoundingBox towerBBox;
+bool hitMeshBBox = false;
+bool hitTriangle = false;
+
+// Test triangle
+Vector3 ta = (Vector3){ -25.0, 0.5, 0.0 };    
+Vector3 tb = (Vector3){ -4.0, 2.5, 1.0 };
+Vector3 tc = (Vector3){ -8.0, 6.5, 0.0 };
+
+Vector3 bary = { 0.0f, 0.0f, 0.0f };
+
+//----------------------------------------------------------------------------------
+// Module Functions Declaration
+//----------------------------------------------------------------------------------
+void UpdateDrawFrame(void);     // Update and Draw one frame
+
+//----------------------------------------------------------------------------------
+// Main Enry Point
+//----------------------------------------------------------------------------------
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - 3d mesh picking");
+
+    // Define the camera to look into our 3d world
+    camera.position = (Vector3){ 10.0f, 8.0f, 10.0f };          // Camera position
+    camera.target = (Vector3){ 0.0f, 2.3f, 0.0f };              // Camera looking at point
+    camera.up = (Vector3){ 0.0f, 1.6f, 0.0f };                  // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                        // Camera field-of-view Y
+
+    tower = LoadModel("resources/tower.obj");     // Load OBJ model
+    texture = LoadTexture("resources/tower.png"); // Load model texture
+    tower.material.texDiffuse = texture;                        // Set model diffuse texture
+    
+    towerBBox = CalculateBoundingBox(tower.mesh);
+
+    SetCameraMode(camera, CAMERA_FREE);     // Set a free camera mode
+
+    SetTargetFPS(60);                       // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+    
+#if defined(PLATFORM_WEB)
+    emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
+#else
+    SetTargetFPS(60);   // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+    
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        UpdateDrawFrame();
+    }
+#endif
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadModel(tower);         // Unload model from GPU
+    UnloadTexture(texture);     // Unload texture from GPU
+    
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition
+//----------------------------------------------------------------------------------
+void UpdateDrawFrame(void)
+{
+    // Update
+    //----------------------------------------------------------------------------------
+    UpdateCamera(&camera);          // Update camera
+    
+    // Display information about closest hit
+    RayHitInfo nearestHit;
+    char *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 = VectorBarycenter(nearestHit.hitPosition, 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 mesh
+        meshHitInfo = GetCollisionRayMesh(ray, &tower.mesh);    
+        
+        if ((meshHitInfo.hit) && (meshHitInfo.distance < nearestHit.distance)) 
+        {
+            nearestHit = meshHitInfo;
+            cursorColor = ORANGE;
+            hitObjectName = "Mesh";
+        }
+        
+    } hitMeshBBox = false; 
+    //----------------------------------------------------------------------------------
+    
+    // Draw
+    //----------------------------------------------------------------------------------
+    BeginDrawing();
+
+        ClearBackground(RAYWHITE);
+
+        Begin3dMode(camera);
+
+            // Draw the tower
+            DrawModel(tower, towerPos, 1.0, 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.hitPosition, 0.5, 0.5, 0.5, cursorColor);
+                DrawCubeWires(nearestHit.hitPosition, 0.5, 0.5, 0.5, YELLOW);
+
+                Vector3 normalEnd;
+                normalEnd.x = nearestHit.hitPosition.x + nearestHit.hitNormal.x;
+                normalEnd.y = nearestHit.hitPosition.y + nearestHit.hitNormal.y;
+                normalEnd.z = nearestHit.hitPosition.z + nearestHit.hitNormal.z;
+                
+                DrawLine3D(nearestHit.hitPosition, normalEnd, YELLOW);
+            }
+
+            DrawRay(ray, MAROON);
+            
+            DrawGrid(100, 1.0f);
+
+        End3dMode();
+        
+        // Draw some debug GUI text
+        DrawText(FormatText("Hit Object: %s", hitObjectName), 10, 50, 10, BLACK);
+
+        if (nearestHit.hit) 
+        {
+            int ypos = 70;
+
+            DrawText(FormatText("Distance: %3.2f", nearestHit.distance), 10, ypos, 10, BLACK);
+            
+            DrawText(FormatText("Hit Pos: %3.2f %3.2f %3.2f", 
+                                nearestHit.hitPosition.x, 
+                                nearestHit.hitPosition.y, 
+                                nearestHit.hitPosition.z), 10, ypos + 15, 10, BLACK);
+                                
+            DrawText(FormatText("Hit Norm: %3.2f %3.2f %3.2f", 
+                                nearestHit.hitNormal.x, 
+                                nearestHit.hitNormal.y, 
+                                nearestHit.hitNormal.z), 10, ypos + 30, 10, BLACK);
+
+            if (hitTriangle) DrawText(FormatText("Barycenter: %3.2f %3.2f %3.2f",  bary.x, bary.y, bary.z), 10, ypos + 45, 10, BLACK);
+        }
+
+        DrawText("Use Mouse to Move Camera", 10, 430, 10, GRAY);
+
+        DrawFPS(10, 10);
+
+    EndDrawing();
+    //----------------------------------------------------------------------------------
+}