having fun messin round

src/lorenz.c

@@ -29,7 +29,6 @@ void lorenzStep(float next[3], vec3 prev, float dt) {
 }
 
 int main(int argc, char *argv[]) {
-	
 	GLFWwindow* window = initOpenGL();
 	glfwSetKeyCallback(window, &key_pressed);
 	
@@ -43,7 +42,7 @@ int main(int argc, char *argv[]) {
 		
 	glBindVertexArray(VAO);
 	glBindBuffer(GL_ARRAY_BUFFER, VBO);
-	glBufferData(GL_ARRAY_BUFFER, 3000* sizeof(vec3), NULL, GL_STREAM_DRAW);
+	glBufferData(GL_ARRAY_BUFFER, 10* sizeof(vec3), NULL, GL_STREAM_DRAW);
 	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0 );
 	glEnableVertexAttribArray(0);
 
@@ -52,18 +51,27 @@ int main(int argc, char *argv[]) {
 	mat4x4_identity(proj);
 	mat4x4_ortho(proj, 0.0, 400.0, 0.0, 400.0, 0.1, 100.0);
 
-	// Uniform Projection Matrix
 	glUseProgram(shader1);
-	int projectionLoc = glGetUniformLocation(shader1, "proj");
-	glUniformMatrix4fv(projectionLoc, 1, GL_FALSE, *proj);
+	int projLoc = glGetUniformLocation(shader1, "proj");
+	//glUniformMatrix4fv(projLoc, 1, GL_FALSE, *proj);
 	
+	// PointsArray
 	vec3* lorenzPoints = malloc(3000 * sizeof(vec3));
 	memset(lorenzPoints, 0, 3000 * sizeof(vec3));
 	vec3 initial = {0.1f, 0.1f, 0.1f};
 	memcpy(lorenzPoints, initial, sizeof(vec3));
-	vec3 sec = {1.0f, 1.0f, 1.0f};
-	memcpy(lorenzPoints, sec, sizeof(vec3));
+	vec3 sec = {0.2f, 0.2f, 0.2f};
+	memcpy(lorenzPoints[1] , sec, sizeof(vec3));
 
+	for (int i=2; i<10; i++){
+		float inc = 0.1 * (float)i;
+		vec3 next = {inc, inc, inc};
+		memcpy(lorenzPoints[i], next, sizeof(vec3));
+	}
+	
+	float* buffer = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
+	memcpy(buffer, lorenzPoints, 10 * sizeof(vec3));
+	glUnmapBuffer(GL_ARRAY_BUFFER);
 
 	int i=1;
 	while(!glfwWindowShouldClose(window)) {
@@ -71,19 +79,12 @@ int main(int argc, char *argv[]) {
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		glUseProgram(shader1);
 		
-		if(i<3000){
-			float increment = 0.1* (float)i;
-			float next[3] = {increment, increment, increment};
-			//lorenzStep(next, lorenzPoints[i], 0.01f);
-			memcpy(lorenzPoints[i++], next, sizeof(vec3));
-	
-	
-			float* buff = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
-			memcpy(buff, lorenzPoints, i * sizeof(vec3));
-			glUnmapBuffer(GL_ARRAY_BUFFER);
-		}
+		i++;
+		if(i>10)
+			i=1;
 
-		glDrawArrays(GL_POINTS, 10, 2);
+
+		glDrawArrays(GL_LINE_STRIP, 0, i);
 		glfwSwapBuffers(window);
 		glfwPollEvents();
 		processInput();