From: Brendan Hansen <brendan.f.hansen@gmail.com>
Date: Tue, 13 Oct 2020 15:40:32 +0000 (-0500)
Subject: initial commit
X-Git-Url: https://git.brendanfh.com/?a=commitdiff_plain;h=2dd82496b63af70939f2614dcd43af02d9404d25;p=csc718.git

initial commit
---

2dd82496b63af70939f2614dcd43af02d9404d25
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2b8e30d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+build/
+*.sublime-project
+*.sublime-workspace
+tags
+sim
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..731481f
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,35 @@
+RELEASE=0
+
+OBJ_FILES=\
+	build/sim.o
+
+ifeq (, $(shell which tcc))
+	CC=gcc
+else
+ifeq ($(RELEASE), 0)
+	CC=gcc
+else
+	CC=tcc
+endif
+endif
+
+INCLUDES=-I./include
+LIBS=-lGL -lglfw
+TARGET=./sim
+
+ifeq ($(RELEASE), 1)
+	FLAGS=-O3
+else
+	FLAGS=-g3
+endif
+
+build/%.o: src/%.c
+	$(CC) $(TIMEFLAG) $(FLAGS) -c $< -o $@ $(INCLUDES)
+
+$(TARGET): $(OBJ_FILES)
+	$(CC) $(TIMEFLAG) $(FLAGS) $(OBJ_FILES) -o $@ $(LIBS)
+
+clean:
+	rm -f $(OBJ_FILES) 2>&1 >/dev/null
+
+all: ./sim
diff --git a/src/sim.c b/src/sim.c
new file mode 100644
index 0000000..fbd700c
--- /dev/null
+++ b/src/sim.c
@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <stdarg.h>
+#include <unistd.h>
+
+#include <GLES3/gl3.h>
+#include <GLFW/glfw3.h>
+
+#define WINDOW_WIDTH		1600
+#define WINDOW_HEIGHT		900
+#define WINDOW_TITLE		"N-Body Simulation"
+
+void __attribute__((noreturn)) panic_and_die(char* msg, ...) {
+	puts("************ PANIC ************");
+
+	va_list va;
+	va_start(va, msg);
+	vprintf(msg, va);
+	va_end(va);
+
+	exit(1);
+}
+
+void glfw_key_handler(GLFWwindow* window, int key, int scancode, int action, int mods) {
+	if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+		glfwSetWindowShouldClose(window, 1);
+}
+
+GLFWwindow* window;
+void init_opengl() {
+	if (!glfwInit()) panic_and_die("Failed to initalize GLFW.");
+
+	window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_TITLE, NULL, NULL);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
+	glfwMakeContextCurrent(window);
+
+	glfwSetKeyCallback(window, glfw_key_handler);
+}
+
+void deinit_opengl() {
+	glfwDestroyWindow(window);
+}
+
+void draw() {
+	glClearColor(1.0, 0.0, 1.0, 1.0);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glfwSwapBuffers(window);
+}
+
+void loop() {
+	while (!glfwWindowShouldClose(window)) {
+		glfwPollEvents();
+
+		draw();
+	}
+}
+
+int main(int argc, char* argv[]) {
+	init_opengl();
+	loop();
+	deinit_opengl();
+}
\ No newline at end of file