scene graph logic
This commit is contained in:
parent
2632068106
commit
14626a5bd5
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@ -4,7 +4,7 @@ OTHER_LIBS = -lm
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ALL_LIBS = $(GLEW_LIBS) $(GLFW_LIBS) $(OTHER_LIBS)
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OBJ = matrixMath.o transformation.o wavefrontobj.o
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OBJ = matrixMath.o transformation.o wavefrontobj.o sceneGraph.o objectHandler.o
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SHADERS = fragmentShader.c vertexShader.c
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cg1.out: test.out main.o $(OBJ) $(SHADERS)
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@ -17,7 +17,7 @@ test.out: test.o $(OBJ)
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%Shader.c: %Shader.glsl
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xxd -i $? > $@
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main.o: $(SHADERS) matrixMath.h transformation.h wavefrontobj.h
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main.o: $(SHADERS) matrixMath.h transformation.h wavefrontobj.h sceneGraph.h objectHandler.h
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test.o: matrixMath.h transformation.h wavefrontobj.h
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@ -13,10 +13,7 @@ uniform vec4 ambientLight;
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uniform vec3 lightPosition;
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uniform vec4 lightColor;
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uniform sampler2D day;
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uniform sampler2D night;
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uniform sampler2D clouds;
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uniform sampler2D ocean;
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uniform sampler2D textureSampler;
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uniform sampler2D normalMap;
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@ -24,13 +21,7 @@ float emissionStrength = 0.0;
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void main() {
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vec4 color = vec4(texture(day, textureCoordinate).rgb, 1.0);
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float nightBrightness = texture(night, textureCoordinate).r;
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vec4 nightColor = vec4(nightBrightness, nightBrightness * 0.7, nightBrightness * 0.5, 1.0);
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float shininessMultiplier = texture(ocean, textureCoordinate).r;
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vec4 cloudColor = texture(clouds, textureCoordinate).rgba;
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vec4 color = vec4(texture(textureSampler, textureCoordinate).rgb, 1.0);
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vec3 norm = normalize(normal);
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@ -40,7 +31,7 @@ void main() {
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float diff = max(dot(norm, lightDir), 0.0);
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vec3 halfway = (lightDir + eyeDir) / length(lightDir + eyeDir);
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float specular = pow(max(dot(halfway, norm), 0.0), shininess) * shininessMultiplier;
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float specular = pow(max(dot(halfway, norm), 0.0), shininess);
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gl_FragColor =
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@ -51,7 +42,7 @@ void main() {
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ambientLight * color +
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// DIFFUSION
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mix(nightColor * (vec4(1,1,1,1) - cloudColor) + (cloudColor * ambientLight), color + cloudColor, diff) +
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color * diff +
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// SPECULAR
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specular * lightColor * color;
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140
src/main.c
140
src/main.c
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@ -5,10 +5,12 @@
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#include "vertexShader.c"
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#include "fragmentShader.c"
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#include "objectHandler.c"
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#include "objectHandler.h"
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#include "matrixMath.h"
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#include "transformation.h"
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#include "wavefrontobj.h"
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#include "sceneGraph.h"
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#define STB_IMAGE_IMPLEMENTATION
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#include "../lib/stb_image.h"
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@ -58,6 +60,11 @@ const GLfloat pi = 3.14159f;
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vec3 cameraPosition = {0.0f, 3.0f, 5.5f};
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vec3 objectPosition = {0.0f, 0.0f, 0.0f};
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GLfloat radius = 1.0f;
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mat4 viewingTransformation;
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// Define a global scene graph root node
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SceneNode* rootNode;
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int numModels = 0;
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char* models[] = {
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@ -150,9 +157,39 @@ void loadTexture(char* textureFile, GLuint* texture) {
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stbi_image_free(image);
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}
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//TODO
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void drawObject() {
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void renderNode(SceneNode* node) {
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mat4 modelView;
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identity(&modelView);
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multiply(&modelView, &node->worldTransformation, &modelView);
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multiply(&modelView, &viewingTransformation, &modelView);
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// calculate matrix for normals
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mat3 normalModelView;
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mat3From4(&normalModelView, &modelView);
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mat3Inverse(&normalModelView, &normalModelView);
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mat3Transpose(&normalModelView, &normalModelView);
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// send transformation matrix to shader
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glUniformMatrix4fv(glGetUniformLocation(program, "modelView"), 1, GL_FALSE, (GLfloat*)&modelView);
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glUniformMatrix3fv(glGetUniformLocation(program, "normalModelView"), 1, GL_FALSE, (GLfloat*)&normalModelView);
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// SET MATERIAL DATA
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glUniform1f(glGetUniformLocation(program, "shininess"), 60.0f * 4.0f);
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// BIND TEXTURES
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GLuint textureLocation;
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textureLocation = glGetUniformLocation(program, "textureSampler");
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glUniform1i(textureLocation, 0);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, textures[DAY]);
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textureLocation = glGetUniformLocation(program, "normalMap");
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glUniform1i(textureLocation, 4);
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glActiveTexture(GL_TEXTURE4);
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glBindTexture(GL_TEXTURE_2D, textures[NORMAL]);
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draw_object(node->objectData);
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}
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void init(void) {
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@ -227,32 +264,7 @@ void init(void) {
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//objectData = readObjFiles(&models, numModels);
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char* c = "../obj/new/Window.obj";
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objectData = readSingleObjFile(&c, 10, &numModels);
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printf("\nAmount %d\n", numModels);
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fflush(stdout);
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/*
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objectData = malloc(numModels * sizeof(ObjectData));
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for (int i = 0; i < numModels; i++) {
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glGenVertexArrays(1, &objData->vao);
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glGenBuffers(1, &objData->vbo);
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glBindVertexArray(objData->vao);
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glBindBuffer(GL_ARRAY_BUFFER, objData->vbo);
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glBufferData(GL_ARRAY_BUFFER, objData->object.numFaces * 3 * sizeof(Vertex), objData->object.vertices, GL_STATIC_DRAW);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (GLvoid*)0);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (GLvoid*)(3 * sizeof(GLfloat)));
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (GLvoid*)(6 * sizeof(GLfloat)));
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glEnableVertexAttribArray(2);
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glBindVertexArray(0);
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objectData[i] = objData;
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}
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*/
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objectData = readSingleObjFile(&c);
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stbi_set_flip_vertically_on_load(flipFlag);
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// -------------- READ TEXTURE FILES
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@ -260,6 +272,19 @@ void init(void) {
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loadTexture(textureFiles[i], &textures[i]);
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}
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setNodeRenderFunction(&renderNode);
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// Create the root scene node
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rootNode = createSceneNode();
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// Create a child node (e.g., for the model)
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SceneNode* modelNode = createSceneNode();
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modelNode->objectData = objectData;
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addChild(rootNode, modelNode);
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// Set transformations for the modelNode (example)
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rotateY(&modelNode->transformation, &modelNode->transformation, pi / 4);
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// ENABLE BACKFACE CULLING
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glFrontFace(GL_CCW);
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glEnable(GL_CULL_FACE);
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@ -312,7 +337,6 @@ void draw(void) {
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vec3 origin = {0.0f, 0.0f, 0.0f};
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vec3 up = {0.0f, 1.0f, 0.0f};
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mat4 viewingTransformation;
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lookAt(&viewingTransformation, &cameraPosition, &origin, &up);
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// -------------- PROJECTION TRANSFORMATION ----------------
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@ -331,75 +355,27 @@ void draw(void) {
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multiply(&projection, &projectionTransformation, &projection);
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multiply(&projection, &normalisationTransformation, &projection);
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// ------------- DRAW EACH OBJECT SEPARATELY ----------------
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for (int i = 0; i < numModels; i++) {
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// Reset model transformation for each object
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mat4 modelTransformation;
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identity(&modelTransformation);
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// Apply object-specific transformations
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vec3 v = {
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(GLfloat)i*2+objectPosition.x,
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0.0f+objectPosition.y,
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0.0f+objectPosition.z
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};
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translate(&modelTransformation, &modelTransformation, &v);
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mat4 modelView;
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identity(&modelView);
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multiply(&modelView, &modelTransformation, &modelView);
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multiply(&modelView, &viewingTransformation, &modelView);
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// calculate matrix for normals
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mat3 normalModelView;
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mat3From4(&normalModelView, &modelView);
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mat3Inverse(&normalModelView, &normalModelView);
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mat3Transpose(&normalModelView, &normalModelView);
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// send transformation matrix to shader
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glUniformMatrix4fv(glGetUniformLocation(program, "modelView"), 1, GL_FALSE, (GLfloat*)&modelView);
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glUniformMatrix3fv(glGetUniformLocation(program, "normalModelView"), 1, GL_FALSE, (GLfloat*)&normalModelView);
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glUniformMatrix4fv(glGetUniformLocation(program, "projection"), 1, GL_FALSE, (GLfloat*)&projection);
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// SET MATERIAL DATA
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glUniform1f(glGetUniformLocation(program, "shininess"), 60.0f * 4.0f);
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// SET LIGHT DATA
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glUniform4f(glGetUniformLocation(program, "lightColor"), 1.0f, 1.0f, 1.0f, 1.0f);
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glUniform4f(glGetUniformLocation(program, "ambientLight"), 0.05f, 0.05f, 0.05f, 1.0f);
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// BIND TEXTURES
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GLuint textureLocation;
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textureLocation = glGetUniformLocation(program, "day");
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textureLocation = glGetUniformLocation(program, "textureSampler");
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glUniform1i(textureLocation, 0);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, textures[DAY]);
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textureLocation = glGetUniformLocation(program, "night");
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glUniform1i(textureLocation, 1);
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glActiveTexture(GL_TEXTURE1);
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glBindTexture(GL_TEXTURE_2D, textures[NIGHT]);
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textureLocation = glGetUniformLocation(program, "clouds");
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glUniform1i(textureLocation, 2);
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glActiveTexture(GL_TEXTURE2);
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glBindTexture(GL_TEXTURE_2D, textures[CLOUDS]);
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textureLocation = glGetUniformLocation(program, "ocean");
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glUniform1i(textureLocation, 3);
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glActiveTexture(GL_TEXTURE3);
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glBindTexture(GL_TEXTURE_2D, textures[OCEAN]);
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textureLocation = glGetUniformLocation(program, "normalMap");
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glUniform1i(textureLocation, 4);
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glActiveTexture(GL_TEXTURE4);
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glBindTexture(GL_TEXTURE_2D, textures[NORMAL]);
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// draw each object separately
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glBindVertexArray(objectData[i].vao);
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glDrawArrays(GL_TRIANGLES, 0, objectData[i].object.length * 3);
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}
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renderSceneNode(rootNode);
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}
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/**
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@ -1,12 +1,8 @@
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#include "objectHandler.h"
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#include "wavefrontobj.h"
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#include <GL/glew.h>
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#include <stdlib.h>
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typedef struct {
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GLuint vao;
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GLuint vbo;
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ParsedObjFile object;
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} ObjectData;
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#include <stdio.h>
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/**
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* Loads an object.
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@ -17,7 +13,7 @@ void load_object(ObjectData* objectData) {
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//GLuint triangleVertexBufferObject;
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glGenBuffers(1, &objectData->vbo);
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glBindBuffer(GL_ARRAY_BUFFER, objectData->vbo);
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glBufferData(GL_ARRAY_BUFFER, objectData->object.length * sizeof(face), objectData->object.faces, GL_STATIC_DRAW);
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glBufferData(GL_ARRAY_BUFFER, objectData->object->length * sizeof(face), objectData->object->faces, GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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@ -98,23 +94,19 @@ ObjectData* readObjFiles(char** path, int numModels, int* count) {
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* Takes a single object and reads it a certain number of times.
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* Returns an array of objects.
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*/
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ObjectData* readSingleObjFile(char** path, int numModels, int* count) {
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ObjectData* objects = (ObjectData*) malloc(sizeof(ObjectData) * numModels);
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*count += numModels;
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ObjectData* readSingleObjFile(char** path) {
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ObjectData* objectData = (ObjectData*) malloc(sizeof(ObjectData));
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if (!objects) {
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if (!objectData) {
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printf("ERROR in objectHandler: Failed to allocate memory for objects\n");
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fflush(stdout);
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return NULL;
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}
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for (int i = 0; i < numModels; ++i) {
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objects[i].object = readObjFile(*path);
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load_object(&objects[i]);
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*count++;
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}
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objectData->object = readObjFile(*path);
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load_object(objectData);
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return objects;
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return objectData;
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}
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/**
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@ -123,6 +115,6 @@ ObjectData* readSingleObjFile(char** path, int numModels, int* count) {
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*/
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void draw_object(ObjectData* objectData) {
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glBindVertexArray(objectData->vao);
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glDrawArrays(GL_TRIANGLES, 0, objectData->object.length * 3); // Annahme: Jedes face hat 3 vertices
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glDrawArrays(GL_TRIANGLES, 0, objectData->object->length * 3); // Annahme: Jedes face hat 3 vertices
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glBindVertexArray(0);
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}
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@ -0,0 +1,17 @@
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#ifndef OBJECTHANDLER_H
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#define OBJECTHANDLER_H
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#include "wavefrontobj.h"
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typedef struct {
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GLuint vao;
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GLuint vbo;
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ParsedObjFile* object;
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} ObjectData;
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extern void load_object(ObjectData* objectData);
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extern ObjectData* readObjFiles(char** path, int numModels, int* count);
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extern ObjectData* readSingleObjFile(char** path);
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extern void draw_object(ObjectData* objectData);
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#endif
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@ -0,0 +1,51 @@
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// sceneGraph.c
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#include "sceneGraph.h"
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#include "objectHandler.h"
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#include <stdlib.h>
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void (*renderFunction)(SceneNode*);
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void setNodeRenderFunction(void (*newRenderFunction)(SceneNode*)) {
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renderFunction = newRenderFunction;
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}
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SceneNode* createSceneNode() {
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SceneNode* node = (SceneNode*)malloc(sizeof(SceneNode));
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identity(&node->transformation);
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identity(&node->worldTransformation);
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node->children = NULL;
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node->numChildren = 0;
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node->objectData = NULL;
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return node;
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}
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void addChild(SceneNode* parent, SceneNode* child) {
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parent->children = (SceneNode**)realloc(parent->children, sizeof(SceneNode*) * (parent->numChildren + 1));
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parent->children[parent->numChildren] = child;
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parent->numChildren++;
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}
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void updateSceneNode(SceneNode* node, mat4* parentTransformation) {
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multiply(&node->worldTransformation, parentTransformation, &node->transformation);
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for (int i = 0; i < node->numChildren; i++) {
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updateSceneNode(node->children[i], &node->worldTransformation);
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}
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}
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void renderSceneNode(SceneNode* node) {
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if (node->objectData) {
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renderFunction(node);
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}
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for (int i = 0; i < node->numChildren; i++) {
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renderSceneNode(node->children[i]);
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}
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}
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void freeSceneNode(SceneNode* node) {
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for (int i = 0; i < node->numChildren; i++) {
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freeSceneNode(node->children[i]);
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}
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free(node->children);
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free(node);
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}
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@ -0,0 +1,30 @@
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// sceneGraph.h
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#ifndef SCENE_GRAPH_H
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#define SCENE_GRAPH_H
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#include <GL/glew.h>
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#include "matrixMath.h"
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#include "wavefrontobj.h"
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#include "objectHandler.h"
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typedef struct SceneNode SceneNode;
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struct SceneNode {
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mat4 transformation; // Local transformation matrix
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mat4 worldTransformation; // World transformation matrix
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SceneNode** children; // Array of pointers to child nodes
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int numChildren; // Number of child nodes
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ObjectData* objectData;
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};
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void setNodeRenderFunction(void (*newRenderFunction)(SceneNode*));
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extern SceneNode* createSceneNode();
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extern void addChild(SceneNode* parent, SceneNode* child);
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extern void updateSceneNode(SceneNode* node, mat4* parentTransformation);
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extern void renderSceneNode(SceneNode* node);
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extern void freeSceneNode(SceneNode* node);
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#endif
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@ -71,7 +71,7 @@ void storeTB(face* f,
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memcpy(&f->v3.tangent, &tangent, sizeof(vec3));
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}
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ParsedObjFile readObjFile(char* path) {
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ParsedObjFile* readObjFile(char* path) {
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ParsedObjFile parsedFile;
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FILE* fp = fopen(path, "r");
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@ -235,9 +235,14 @@ ParsedObjFile readObjFile(char* path) {
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free(normals);
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fclose(fp);
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return parsedFile;
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// copy parsed file into allocated memory and return pointer to it
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ParsedObjFile* ptr = (ParsedObjFile*) malloc(sizeof(ParsedObjFile));
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memcpy(ptr, &parsedFile, sizeof(ParsedObjFile));
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||||
return ptr;
|
||||
}
|
||||
|
||||
void clearParsedFile(ParsedObjFile file) {
|
||||
free(file.faces);
|
||||
void clearParsedFile(ParsedObjFile* file) {
|
||||
free(file->faces);
|
||||
free(file);
|
||||
}
|
||||
|
|
@ -23,8 +23,8 @@ typedef struct {
|
|||
} ParsedObjFile;
|
||||
|
||||
|
||||
extern ParsedObjFile readObjFile(char* path);
|
||||
extern void clearParsedFile(ParsedObjFile file);
|
||||
extern ParsedObjFile* readObjFile(char* path);
|
||||
extern void clearParsedFile(ParsedObjFile* file);
|
||||
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue