Add files via upload

Author: C-Collamar

Controls and Animation/README.md

@@ -0,0 +1,3 @@
+This program makes use of rendering objects to the screen frame by frame; basically animation.
+
+Here's what makes this program very special to me:

Controls and Animation/motion.gif

@@ -0,0 +1,168 @@
+/*My very first graphics programming code
+ *My first program using APIs
+ *I used SDL 2.0.4 at the time of this creation (09/21/16)
+ */
+
+/*
+ *  This program makes use of rendering
+ * objects to the screen frame by frame;
+ * wihch is basically animation
+ */
+
+/*
+ * CONTROLS:
+ * 	Up Arrow key - moves object up
+ * 	Down Arrow key - moves object down
+ * 	Left Arrow key - moves object to the left
+ * 	Right Arrow key - moves object to the right
+ * 	Enter key - enlarges the object
+ * 	Backspace key - reduces object size
+ *
+ */
+
+#include<stdio.h>
+#include<stdlib.h>
+#include"SDL.h"
+
+const unsigned int WIDTH = 640;
+const unsigned int HEIGHT = 480;
+
+
+typedef struct object {
+	unsigned int size; //size of object
+	int x; //x-coordinate of object
+	int y; //y-coordinate of object
+} Object;
+
+void init(SDL_Window **window, SDL_Renderer **renderer) {
+
+	SDL_Init(SDL_INIT_VIDEO);
+
+	*window = SDL_CreateWindow("Motion Rendering",
+			SDL_WINDOWPOS_UNDEFINED,
+			SDL_WINDOWPOS_UNDEFINED,
+			WIDTH,
+			HEIGHT,
+			0);
+
+	if(*window == NULL) {
+		printf("ERROR; Window cannot be initialized.\n");
+		exit(EXIT_FAILURE);
+	}
+
+	*renderer = SDL_CreateRenderer(*window, -1,
+			SDL_RENDERER_ACCELERATED |
+			SDL_RENDERER_PRESENTVSYNC);
+
+	if(*renderer == NULL) {
+		printf("ERROR: Renderer could not be initialized.\n");
+		exit(EXIT_FAILURE);
+	}
+
+}
+void destroy(SDL_Window **window, SDL_Renderer **renderer) {
+
+	//destroy objects
+	SDL_DestroyWindow(*window);
+	SDL_DestroyRenderer(*renderer);
+
+}
+int processEvents(SDL_Event *event, Object *object) {
+
+	while(SDL_PollEvent(event))
+	{
+
+		switch(event->type)
+		{
+			case SDL_QUIT:
+				return 1;
+			case SDL_WINDOWEVENT_CLOSE:
+				return 1;
+
+			case SDL_KEYDOWN:
+				switch(event->key.keysym.sym)
+				{
+					case SDLK_ESCAPE:
+					case SDL_QUIT:
+						return 1;
+					case SDLK_UP:
+						object->y -= 30;
+						break;
+					case SDLK_DOWN:
+						object->y += 30;
+						break;
+					case SDLK_LEFT:
+						object->x -= 30;
+						break;
+					case SDLK_RIGHT:
+						object->x += 30;
+						break;
+					case SDLK_RETURN:
+						object->size += 10;
+						object->x -= 5;
+						object->y -= 5;
+						break;
+					case SDLK_BACKSPACE:
+						object->size -= 10;
+						object->x += 5;
+						object->y += 5;
+						break;
+				}
+
+				printf("Object location: [%i, %i]\tsize = %i\n", object->x, object->y, object->size);
+				break;
+		}
+
+	}
+
+	return 0;
+
+}
+void renderOnScreen(SDL_Window **window, SDL_Renderer **renderer, const Object *object) {
+
+	//set render color to blue
+	SDL_SetRenderDrawColor(*renderer, 0, 0, 255, 255);
+	//colors the active renderer to blue
+	SDL_RenderClear(*renderer);
+	//sets render color to white
+	SDL_SetRenderDrawColor(*renderer, 255, 255, 255, 255);
+
+	//Declare & initialize rect. object
+	SDL_Rect rect = {object->x, object->y, object->size, object->size};
+
+	//fill to the current rendering target
+	SDL_RenderFillRect(*renderer, &rect);
+
+	//present the drawing on the renderer to the screen
+	SDL_RenderPresent(*renderer);
+
+	//to avoid CPU overheating
+	SDL_Delay(10);
+
+}
+
+int main(int argc, char *argv[]) {
+
+	SDL_Window *window = NULL;
+	SDL_Renderer *renderer = NULL;
+	SDL_Event event;
+
+	Object object = {200, WIDTH/2 - object.size / 2, HEIGHT/2 - object.size / 2};
+	int done = 0;
+
+	//initialize all variables needed
+	init(&window, &renderer);
+
+	while(!done) {
+		done = processEvents(&event, &object);
+		renderOnScreen(&window, &renderer, &object);
+	}
+
+	destroy(&window, &renderer);
+
+	//clean-up and quit
+	SDL_Quit();
+
+	return EXIT_SUCCESS;
+
+}