I have these 2 shaders:
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) in vec3 in_position;
layout(binding = 0) uniform MVPOnlyUbo {
mat4 model;
mat4 view;
mat4 proj;
} ubo;
void main()
{
gl_PointSize = 5.f;
gl_Position = vec4(in_position.xy, 0.5, 1.0);
}
#version 450
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) out vec4 color_out;
void main()
{
color_out = vec4(0, 1, 0, 1);
}
Which are as simple as they can get.
If modify the vertex shader to do:
gl_Position = ubo.proj * ubo.view * vec4(in_position.xy, 0.5, 1.0);
I see this (correct):
If I instead do the orthogonal projection:
gl_Position = vec4(in_position.xy, 0.5, 1.0);
I see this (i.e. all the points seem to conglomerate in either y=0 or y=-1):
What is particularly strange to me is that if I inspect things with renderdoc I see this as the mesh and vertex values (for the non working version):
So the vertex in and vertex out are correct, the VS is emitting the attribute input without modification. And renderdoc itself shows this as the output:
I should be seeing a cloud of green points in the bottom right corner of my screen, why am I seeing 2 lines and nothing inside the quadrant?
There's no other draw calls or anything like that, renderdoc shows this as the output of the renderpass that uses these 2 shaders. Why are renderdoc and glsl giving me different results to what should be hapenning with the lower right quadrant of the screen?
