Working on examples...

- Removed rbmf font example
- Reviewed physac examples

examples/textures/textures_particles_blending.c

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+/*******************************************************************************************
+*
+*   raylib example - particles blending
+*
+*   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) 2017 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define MAX_PARTICLES 200
+
+// Particle structure with basic data
+typedef struct {
+    Vector2 position;
+    Color color;
+    float alpha;
+    float size;
+    float rotation;
+    bool active;        // NOTE: Use it to activate/deactive particle
+} Particle;
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [textures] example - particles blending");
+    
+    // Particles pool, reuse them!
+    Particle mouseTail[MAX_PARTICLES]; 
+    
+    // Initialize particles
+    for (int i = 0; i < MAX_PARTICLES; i++)
+    {
+        mouseTail[i].position = (Vector2){ 0, 0 };
+        mouseTail[i].color = (Color){ GetRandomValue(0, 255), GetRandomValue(0, 255), GetRandomValue(0, 255), 255 };
+        mouseTail[i].alpha = 1.0f;
+        mouseTail[i].size = (float)GetRandomValue(1, 30)/20.0f;
+        mouseTail[i].rotation = GetRandomValue(0, 360);
+        mouseTail[i].active = false;
+    }
+    
+    float gravity = 3.0f;
+
+    Texture2D smoke = LoadTexture("resources/smoke.png");
+    
+    int blending = BLEND_ALPHA;
+    
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        
+        // Activate one particle every frame and Update active particles
+        // NOTE: Particles initial position should be mouse position when activated
+        // NOTE: Particles fall down with gravity and rotation... and disappear after 2 seconds (alpha = 0)
+        // NOTE: When a particle disappears, active = false and it can be reused.
+        for (int i = 0; i < MAX_PARTICLES; i++)
+        {
+            if (!mouseTail[i].active)
+            {
+                mouseTail[i].active = true;
+                mouseTail[i].alpha = 1.0f;
+                mouseTail[i].position = GetMousePosition();
+                i = MAX_PARTICLES;
+            }
+        }
+
+        for (int i = 0; i < MAX_PARTICLES; i++)
+        {
+            if (mouseTail[i].active)
+            {
+                mouseTail[i].position.y += gravity;
+                mouseTail[i].alpha -= 0.01f;
+                
+                if (mouseTail[i].alpha <= 0.0f) mouseTail[i].active = false;
+                
+                mouseTail[i].rotation += 5.0f;
+            }
+        }
+        
+        if (IsKeyPressed(KEY_SPACE))
+        {
+            if (blending == BLEND_ALPHA) blending = BLEND_ADDITIVE;
+            else blending = BLEND_ALPHA;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(DARKGRAY);
+            
+            BeginBlendMode(blending);
+
+                // Draw active particles
+                for (int i = 0; i < MAX_PARTICLES; i++)
+                {
+                    if (mouseTail[i].active) DrawTexturePro(smoke, (Rectangle){ 0, 0, smoke.width, smoke.height }, 
+                                                           (Rectangle){ mouseTail[i].position.x, mouseTail[i].position.y, smoke.width*mouseTail[i].size, smoke.height*mouseTail[i].size },
+                                                           (Vector2){ smoke.width*mouseTail[i].size/2, smoke.height*mouseTail[i].size/2 }, mouseTail[i].rotation,
+                                                           Fade(mouseTail[i].color, mouseTail[i].alpha));
+                }
+            
+            EndBlendMode();
+            
+            DrawText("PRESS SPACE to CHANGE BLENDING MODE", 180, 20, 20, BLACK);
+            
+            if (blending == BLEND_ALPHA) DrawText("ALPHA BLENDING", 290, screenHeight - 40, 20, BLACK);
+            else DrawText("ADDITIVE BLENDING", 280, screenHeight - 40, 20, RAYWHITE);
+            
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadTexture(smoke);
+    
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}