So I’ve recently been messing around with GLSL and wrote a simple pair of vertex/fragment shaders as a test for vertex attributes. Here they are:
Vertex:
#version 330
layout (location = 0) in vec2 VertexPosition;
layout (location = 1) in vec3 VertexColor;
out vec3 Color;
void main(){
Color = VertexColor;
gl_Position = vec4(VertexPosition, 0.0, 1.0);
}
Fragment:
#version 330
out vec4 FragColor
in vec3 Color;
void main(){
FragColor = vec4(Color, 1.0);
}
I pass in the vertex attributes like this:
shader.bind();
glEnableVertexAttribArray(0);
//Map index 0 to the position buffer
glBindBuffer(GL_ARRAY_BUFFER, vboVertexBuffer);
glBindAttribLocation(shader.getProgram(), 0, “VertexPosition”); //not sure if this line’s necessary
glVertexAttribPointer(0, 2, GL_FLOAT, false, 2*4, 0);
glDisableVertexAttribArray(0);
glEnableVertexAttribArray(1);
//Map index 1 to the color buffer
glBindBuffer(GL_ARRAY_BUFFER, vboColorBuffer);
glBindAttribLocation(shader.getProgram(), 1, “VertexColor”);
glVertexAttribPointer(1, 3, GL_FLOAT, false, 3*4, 0);
glDisableVertexAttribArray(1);
shader.unbind();
shader.compile(); //links and validates the shader
I run it and get a black screen. What a wonderful thing GLSL is that it can produce such beautiful black screens xD. I have this colored triangle I rendered with VBO that renders without the shader, but not with the shader. Any ideas on why?