Hey guys,
when rendering my framebuffer attached texture to a display quad, it turns out black, which makes absolutely no sense to me, since I have a second framebuffer with a depth texture, which workes perfectly fine. Also when displaying the rendered output onto the screen instead of storing it in the FBO, it is rendered as it should be and also GL_FRAMEBUFFER_COMPLETE and glGetError return no errors.
The buffer is generated using
generateBuffer(normalBuffer, normalMap, GL_RGBA, GL_COLOR_ATTACHMENT0)
using the method generateBuffer:
glGenFramebuffers(1, &buffer);
glGenTextures(1, &map);
glBindTexture(GL_TEXTURE_2D, map);
glTexImage2D(GL_TEXTURE_2D, 0, macro, depthWidth, depthHeight, 0, macro, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glBindFramebuffer(GL_FRAMEBUFFER, buffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, map, 0);
std::vector<GLenum> drawBuffers = { GL_NONE };
glDrawBuffers(1, drawBuffers.data());
GLenum status2 = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status2 != GL_FRAMEBUFFER_COMPLETE)
{
std::cout << "incomplete framebuffer object " << status2 << std::endl;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
The texture is then filled with data using:
Shader::setActiveProgram(normalShaderProgram);
normalShaderProgram->setMat4("lightSpace", ligthProjection * lightView);
glViewport(0, 0, depthWidth, depthHeight);
glBindFramebuffer(GL_FRAMEBUFFER, normalBuffer);
glClear(GL_COLOR_BUFFER_BIT);
glClear(GL_DEPTH_BUFFER_BIT);
glActiveTexture(GL_TEXTURE0);
normalShaderProgram->setMat4("model", model);
glBindVertexArray(cubeVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
//glBindVertexArray(boxVAO);
//glDrawArrays(GL_TRIANGLES, 0, 36);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
and the vertex shader:
#version 330 core
layout (location = 0) in vec3 aPos;
layout (location = 1) in vec3 aNormal;
uniform mat4 lightSpace;
uniform mat4 model;
out vec3 color;
void main()
{
gl_Position = lightSpace * vec4(aPos, 1.0);
color = (aNormal * vec3(0.5)) + vec3(0.5);
}
and the fragment shader:
#version 330 core
layout(location = 0) out vec4 FragColor;
in vec3 color;
void main()
{
FragColor = color;
}
The fragment shader for the display quad is:
#version 330 core
out vec4 FragColor;
in vec2 uv;
uniform sampler2D normalMap;
void main()
{
FragColor = texture(normalMap, uv);
}
The vertex shader for the display quad is exactly the same as for the depth texture, which works perfectly fine, so this cannot be the failing part.
I am pretty sure, that the solution is very easy and I am just overlooking something, but I just cannot figure out my mistake.
Thanks in advance for everyone looking and this problem and trying to help me.