From 2e460aef60ec16bab664550776d581d9e7ad30e0 Mon Sep 17 00:00:00 2001
From: JonasJan2 <niewiederhunde@wolke7.net>
Date: Mon, 27 May 2024 10:05:38 +0200
Subject: [PATCH] new branch for mult obj testing

---
 src/main.c | 162 ++++++++++++++++++++++++++++-------------------------
 1 file changed, 87 insertions(+), 75 deletions(-)

diff --git a/src/main.c b/src/main.c
index f877312..4ad7515 100644
--- a/src/main.c
+++ b/src/main.c
@@ -19,7 +19,8 @@
 #include <stdbool.h>
 
 GLuint program;
-GLuint vao;
+GLuint vao[2];
+int numObj = 0;
 
 #define NUM_TEXTURES 5
 
@@ -40,7 +41,7 @@ char* textureFiles[NUM_TEXTURES] = {
 	"../texture/earth/normal.png"
 };
 
-int numFaces = 0; 
+int numFaces[2] = {0, 0}; 
 
 bool exitRequested = false;
 
@@ -58,8 +59,8 @@ const GLfloat pi = 3.14159f;
 
 vec3 cameraPosition = {0.0f, 3.0f, 5.5f};
 
-char* defaultModel = "../obj/monkey.obj";
-char* model;
+char* defaultModel = "../obj/plane.obj";
+char* model = "../obj/earth.obj";
 
 // input handler for camera movement
 void handleInputs(double deltaTime) {
@@ -120,6 +121,77 @@ void loadTexture(char* textureFile, GLuint* texture) {
 	stbi_image_free(image);
 }
 
+void load_object(ParsedObjFile* object) {
+		// write faces to buffer
+	GLuint triangleVertexBufferObject;
+	glGenBuffers(1, &triangleVertexBufferObject);
+	glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBufferObject);
+	glBufferData(GL_ARRAY_BUFFER, object->length * sizeof(face), object->faces, GL_STATIC_DRAW);
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+
+	stbi_set_flip_vertically_on_load(flipFlag);
+	// -------------- READ TEXTURE FILES
+	for (int i = 0; i < NUM_TEXTURES; i++) {
+		loadTexture(textureFiles[i], &textures[i]);
+	}
+
+
+	// create vertex array object
+	glGenVertexArrays(1, &vao[numObj]);
+	glBindVertexArray(vao[numObj]);
+	glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBufferObject);
+
+	// vertex positions
+	glVertexAttribPointer(
+		0,
+		3,
+		GL_FLOAT,
+		GL_FALSE,
+		sizeof(vertex),
+		0
+	);
+	glEnableVertexAttribArray(0);
+
+	// vertex normals
+	glVertexAttribPointer(
+		1,
+		3,
+		GL_FLOAT,
+		GL_FALSE,
+		sizeof(vertex),
+		(void*) offsetof(vertex, normal)
+	);
+	glEnableVertexAttribArray(1);
+
+	// vertex texture coordinates
+	glVertexAttribPointer(
+		2,
+		2,
+		GL_FLOAT,
+		GL_FALSE,
+		sizeof(vertex),
+		(void*) offsetof(vertex, texture)
+	);
+	glEnableVertexAttribArray(2);
+
+	// face tangents
+	glVertexAttribPointer(
+		3,
+		3,
+		GL_FLOAT,
+		GL_FALSE,
+		sizeof(vertex),
+		(void*) offsetof(vertex, tangent)
+	);
+	glEnableVertexAttribArray(3);
+
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
+	glBindVertexArray(0);
+
+	numObj++; //Erst hier inkrementieren, weil Index sonst nicht klappt
+}
+
 void init(void) {
 	// create and compile vertex shader
 	const GLchar *vertexTextConst = vertexShader_glsl;
@@ -192,76 +264,13 @@ void init(void) {
 
 
 	// --------------- READ MODEL FILE
-	ParsedObjFile teapot = readObjFile(model);
-	numFaces = teapot.length;
-
-	// write faces to buffer
-	GLuint triangleVertexBufferObject;
-	glGenBuffers(1, &triangleVertexBufferObject);
-	glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBufferObject);
-	glBufferData(GL_ARRAY_BUFFER, teapot.length * sizeof(face), teapot.faces, GL_STATIC_DRAW);
-	glBindBuffer(GL_ARRAY_BUFFER, 0);
-
-
-	stbi_set_flip_vertically_on_load(flipFlag);
-	// -------------- READ TEXTURE FILES
-	for (int i = 0; i < NUM_TEXTURES; i++) {
-		loadTexture(textureFiles[i], &textures[i]);
-	}
-
-
-	// create vertex array object
-	glGenVertexArrays(1, &vao);
-	glBindVertexArray(vao);
-	glBindBuffer(GL_ARRAY_BUFFER, triangleVertexBufferObject);
-
-	// vertex positions
-	glVertexAttribPointer(
-		0,
-		3,
-		GL_FLOAT,
-		GL_FALSE,
-		sizeof(vertex),
-		0
-	);
-	glEnableVertexAttribArray(0);
-
-	// vertex normals
-	glVertexAttribPointer(
-		1,
-		3,
-		GL_FLOAT,
-		GL_FALSE,
-		sizeof(vertex),
-		(void*) offsetof(vertex, normal)
-	);
-	glEnableVertexAttribArray(1);
-
-	// vertex texture coordinates
-	glVertexAttribPointer(
-		2,
-		2,
-		GL_FLOAT,
-		GL_FALSE,
-		sizeof(vertex),
-		(void*) offsetof(vertex, texture)
-	);
-	glEnableVertexAttribArray(2);
-
-	// face tangents
-	glVertexAttribPointer(
-		3,
-		3,
-		GL_FLOAT,
-		GL_FALSE,
-		sizeof(vertex),
-		(void*) offsetof(vertex, tangent)
-	);
-	glEnableVertexAttribArray(3);
-
-	glBindBuffer(GL_ARRAY_BUFFER, 0);
-	glBindVertexArray(0);
+	ParsedObjFile object = readObjFile(model);
+	ParsedObjFile object1 = readObjFile(defaultModel);
+	numFaces[0] = object.length;
+	numFaces[1] = object1.length;
 
+	load_object(&object1);
+	load_object(&object);
 
 	// ENABLE BACKFACE CULLING
 	glFrontFace(GL_CCW);
@@ -298,7 +307,7 @@ void draw(void) {
 
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 	glUseProgram(program);
-	glBindVertexArray(vao);
+
 
 	// step for rotations
 	// counts up to 1.0 and then resets back to 0.0 forever
@@ -407,7 +416,10 @@ void draw(void) {
 
 
 	// draw!!1
-	glDrawArrays(GL_TRIANGLES, 0, numFaces * 3);
+	glBindVertexArray(vao[0]);
+	glDrawArrays(GL_TRIANGLES, 0, numFaces[0] * 3);
+	glBindVertexArray(vao[1]);
+	glDrawArrays(GL_TRIANGLES, 0, numFaces[1] * 3);
 }
 
 // change viewport size and adjust aspect ratio when changing window size