diff options
Diffstat (limited to 'src/main.cpp')
| -rw-r--r-- | src/main.cpp | 118 |
1 files changed, 104 insertions, 14 deletions
diff --git a/src/main.cpp b/src/main.cpp index c05d25e..41d5e76 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -51,10 +51,10 @@ private: glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indices.size(),
indices.data(), GL_STATIC_DRAW);
- glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)(0));
glEnableVertexAttribArray(0);
- glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)(sizeof(float) * 3));
+ glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)(0));
glEnableVertexAttribArray(1);
+ glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)(sizeof(float) * 3));
glBindVertexArray(0);
}
@@ -142,6 +142,16 @@ struct arccam { rot.y = glm::radians(minY) * angleFactor;
}
+ glm::vec3 getPos() {
+ float angle = rot.y / angleFactor;
+
+ float camY = sin(angle) * exp(radius);
+ float camZ = cos(angle) * exp(radius);
+
+ glm::vec3 result(0.0, camY, camZ);
+ return glm::rotate(result, -rot.x / angleFactor, glm::vec3(0, 1, 0));
+ }
+
glm::mat4 getViewMatrix() {
float angle = rot.y / angleFactor;
@@ -160,14 +170,10 @@ private: std::string readFile(std::string filename) {
std::ifstream ifs(filename, std::ios::binary);
- ifs.seekg(0, ifs.end);
- long length = ifs.tellg();
- ifs.seekg(0, ifs.beg);
- char *buffer = (char*)malloc(length);
- ifs.read(buffer, length);
- ifs.close();
- std::string result(buffer);
- free(buffer);
+ std::string result, line;
+ while (std::getline(ifs, line))
+ result += line + "\n";
+
return result;
}
@@ -213,7 +219,7 @@ GLuint compileShaders(const char *vertFilename, const char *fragFilename) { glGetShaderiv(vertShader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(vertShader, 512, NULL, infoLog);
- printf("Error compiling vertex shader: %s\n", infoLog);
+ printf("Error compiling vertex shader(%s): %s\n", vertFilename, infoLog);
}
GLuint fragShader = glCreateShader(GL_FRAGMENT_SHADER);
@@ -225,7 +231,7 @@ GLuint compileShaders(const char *vertFilename, const char *fragFilename) { glGetShaderiv(fragShader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(fragShader, 512, NULL, infoLog);
- printf("Error compiling fragment shader: %s\n", infoLog);
+ printf("Error compiling fragment shader(%s): %s\n", fragFilename, infoLog);
}
// Link Shader Program
@@ -251,6 +257,8 @@ GLuint compileShaders(const char *vertFilename, const char *fragFilename) { int main() {
// Window Setup
+ const int width = 1600, height = 900;
+
sf::ContextSettings settings;
settings.depthBits = 24;
settings.antialiasingLevel = 0;
@@ -285,6 +293,69 @@ int main() { glm::mat4 proj = glm::perspective(glm::radians(45.0f), (float)window.getSize().x / window.getSize().y, 0.001f, 1000.0f);
+ // Framebuffer
+ GLuint fbo;
+ glGenFramebuffers(1, &fbo);
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+
+ GLuint renderTexture;
+ glGenTextures(1, &renderTexture);
+ glBindTexture(GL_TEXTURE_2D, renderTexture);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ //glBindTexture(GL_TEXTURE_2D, 0);
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, renderTexture, 0);
+
+ GLuint rbo;
+ glGenRenderbuffers(1, &rbo);
+ glBindRenderbuffer(GL_RENDERBUFFER, rbo);
+ glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
+ //glBindRenderbuffer(GL_RENDERBUFFER, 0);
+ glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rbo);
+
+ if (glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE) {
+ printf("Successfully created framebuffer\n");
+ }
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+ GLuint screenShaderProgram = compileShaders("shaders/fbo_vert.glsl", "shaders/fbo_frag.glsl");
+ glUseProgram(screenShaderProgram);
+ glUniform1i(glGetUniformLocation(screenShaderProgram, "screenTexture"), 0);
+
+ // Screen VAO
+
+ GLuint screenVBO;
+ glGenBuffers(1, &screenVBO);
+
+ GLuint screenVAO;
+ glGenVertexArrays(1, &screenVAO);
+
+ glBindVertexArray(screenVAO);
+
+ float screenVerts[] = {
+ -1.0f, +1.0f, +0.0f, +1.0f,
+ -1.0f, -1.0f, +0.0f, +0.0f,
+ +1.0f, -1.0f, +1.0f, +0.0f,
+
+ -1.0f, +1.0f, +0.0f, +1.0f,
+ +1.0f, -1.0f, +1.0f, +0.0f,
+ +1.0f, +1.0f, +1.0f, +1.0f,
+ };
+
+ glBindBuffer(GL_ARRAY_BUFFER, screenVBO);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 6 * 4,
+ screenVerts, GL_STATIC_DRAW);
+
+ glEnableVertexAttribArray(0);
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, (void*)(0));
+ glEnableVertexAttribArray(1);
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, (void*)(sizeof(float) * 2));
+
+ glBindVertexArray(0);
+
+ // Config
+
struct {
bool wireframe = false;
bool freecam = false;
@@ -343,10 +414,11 @@ int main() { prevMouse = sf::Mouse::isButtonPressed(sf::Mouse::Right);
- // Render
+ // Render to fbo
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+ glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
glEnable(GL_DEPTH_TEST);
if (options.wireframe)
@@ -380,11 +452,27 @@ int main() { glUniform3fv(
glGetUniformLocation(shaderProgram, "lightPos"),
1, glm::value_ptr(lightPos));
+ glUniform3fv(
+ glGetUniformLocation(shaderProgram, "viewPos"),
+ 1, glm::value_ptr(options.freecam ? freeCam.pos : arcCam.getPos()));
m.draw();
+
+ // Render fbo to screen
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ glDisable(GL_DEPTH_TEST);
+ glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glUseProgram(screenShaderProgram);
+
+ glBindVertexArray(screenVAO);
+ glBindTexture(GL_TEXTURE_2D, renderTexture);
+ glDrawArrays(GL_TRIANGLES, 0, 6);
+ glBindVertexArray(0);
+
ImGui::SFML::Update(window, deltaClock.restart());
ImGui::Begin("Options");
@@ -412,5 +500,7 @@ int main() { window.display();
}
+ glDeleteFramebuffers(1, &fbo);
+
return 0;
}
\ No newline at end of file |