Idk every rating I see donda 2 is on the bottom. The shorter version of 530 on donda 2 is better than the full one from vultures 2. Surely not the best album but nor is it as bad as people show it to be.
So I am planning to use instancing to draw wheels for a truck. I draw the truck first and then the wheels. Since I need to use a separate shader for instancing, Whenever I bind that shader, the truck disappears and only the wheels I draw are visible.
For the shaders, I have the same fragment shader (main.fs) and for the vertex shaders I have two (main.vs & wheels.vs) which I have attached below.
> main.vs
#version 410
layout(location = 0) in vec3 positionIn;
layout(location = 1) in vec2 textureCoord;
layout(location = 2) in vec3 normalIn;
out vec3 position;
out vec2 textureCoordinate;
out vec3 normal;
uniform mat4 projMat;
uniform mat4 transMat;
void main() {
normal = (transMat * vec4(-normalIn, 0)).xyz;
textureCoordinate = textureCoord;
position = (transMat * vec4(positionIn, 1)).xyz;
gl_Position = projMat * transMat * vec4(positionIn, 1);
}
> wheels.vs
#version 410
layout(location = 0) in vec3 positionIn;
layout(location = 1) in vec2 textureCoord;
layout(location = 2) in vec3 normalIn;
out vec3 position;
out vec2 textureCoordinate;
out vec3 normal;
uniform mat4 projMat;
uniform vec3[10] offsets;
uniform vec2[10] rotationXY;
void main() {
vec3 offset = offsets[gl_InstanceID];
vec2 rotation = rotationXY[gl_InstanceID];
mat4 transMat = mat4(
cos(rotation.y), 0, sin(rotation.y), 0,
0, 1, 0, 0,
-sin(rotation.y), 0, cos(rotation.y), 0,
0, 0, 0, 1
);
transMat *= mat4(
1, 0, 0, 0,
0, cos(rotation.x), -sin(rotation.x), 0,
0, sin(rotation.x), cos(rotation.x), 0,
0, 0, 0, 1
);
normal = (transMat * vec4(-normalIn, 0)).xyz;
textureCoordinate = textureCoord;
position = (transMat * vec4(positionIn + offset, 1)).xyz;
gl_Position = projMat * vec4(position, 1);
}
And this is how I render the object. Note that the child.render() has the exact same structure, apart from the fact that no transformation matrix is sent and glDrawElementsInstanced is used instead.
texture.bind();
glUniformMatrix4fv(transMatrix, false, getTransformationMatrix());
glBindVertexArray(vertexArray);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glEnableVertexAttribArray(2);
glDrawElements(mode, vertexCount, GL_UNSIGNED_INT, 0);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glDisableVertexAttribArray(2);
glBindVertexArray(0);
texture.unbind();
for(LCObject child : children) {
child.getShader().bind();
child.render();
}
PS: Im on a Mac M1 if that is of any importance.