所以我有一個3D的OpenGL應用程序,我想要顯示一個2D HUD,我理解了很多谷歌搜索後如何做到這一點的基本概念,但我沒有嘗試讓它顯示出來。去在許多其他的例子後,我當前的代碼是這樣的:OpenGL 2D HUD沒有顯示
// HUD ///////////////////////////////////
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, (GLdouble)WIDTH, (GLdouble)HEIGHT, 0, -1, 1);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glColor3f(1, 1, 1);
glPushMatrix();
glBegin(GL_QUADS);
glVertex3f(-5.0f, 5.0f, 0.0f);
glVertex3f(-5.0f, -5.0f, 0.0f);
glVertex3f(5.0f, -5.0f, 0.0f);
glVertex3f(5.0f, 5.0f, 0.0f);
glEnd();
glPopMatrix();
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
眼下沒有什麼視覺上的變化,我可以得到整個清屏的顏色但即使如此,我似乎無法畫上一個四。
編輯:
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, WIDTH, HEIGHT, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClear(GL_DEPTH_BUFFER_BIT);
glColor3f(1, 1, 1);
glPushMatrix();
glBegin(GL_QUADS);
glVertex3f(-10.0f, 10.0f, 0.0f);
glVertex3f(-10.0f, -10.0f, 0.0f);
glVertex3f(10.0f, -10.0f, 0.0f);
glVertex3f(10.0f, 10.0f, 0.0f);
glEnd();
glPopMatrix();
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
編輯2:空中包廂CODE
glDisable(GL_CULL_FACE);
glDepthFunc(GL_LEQUAL); // Change depth function so depth test passes when values are equal to depth buffer's content
skyShader.Bind();
view = glm::mat4(glm::mat3(camera.GetViewProjection())); // Remove any translation component of the view matrix
glUniformMatrix4fv(glGetUniformLocation(skyShader.getProg(), "view"), 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(glGetUniformLocation(skyShader.getProg(), "projection"), 1, GL_FALSE, glm::value_ptr(projection));
// SKYBOX CUBE /////////////////////////////////
glBindVertexArray(skyboxVAO);
glActiveTexture(GL_TEXTURE0);
glUniform1i(glGetUniformLocation(skyShader.getProg(), "skybox"), 0);
glBindTexture(GL_TEXTURE_CUBE_MAP, skyboxTexture);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
glDepthFunc(GL_LESS); // Set depth function back to default
您正在圖像的左上角繪製5個像素,其他3/4的四邊形都在視錐外。 – derhass
@derhass也許我只是在愚蠢,但我沒有遵循,我已經改變了頂點值,但仍然沒有看到任何東西。 – thesyncer
改成了什麼? – derhass