generate_quad()

QuadGeometry MayaFlux::Kinesis::generate_quad	(	glm::vec2	position = glm::vec2(0.0F),
		glm::vec2	scale = glm::vec2(1.0F),
		float	rotation = 0.0F
	)

Generate a textured quad centred on the origin.

Parameters

position	Translation in XY (z remains 0). Default: no translation.
scale	Extents in XY before rotation. Default: {1,1} → NDC-spanning quad.
rotation	Rotation angle in radians around Z axis. Default: 0.

Returns

QuadGeometry ready for TRIANGLE_STRIP draw.

UV origin is bottom-left (0,1) to match Vulkan image layout. Base vertices sit at ±scale before rotation and translation are applied.

Definition at line 665 of file GeometryPrimitives.cpp.

{
    const float cos_r = std::cos(rotation);
    const float sin_r = std::sin(rotation);
 
    QuadGeometry out { .layout = Kakshya::VertexLayout::for_textured_quad() };
 
    for (size_t i = 0; i < 4; ++i) {
        const float x = k_unit_quad[i].position.x * scale.x;
        const float y = k_unit_quad[i].position.y * scale.y;
 
        out.vertices[i].position = {
            x * cos_r - y * sin_r + position.x,
            x * sin_r + y * cos_r + position.y,
            0.0F,
        };
        out.vertices[i].texcoord = k_unit_quad[i].texcoord;
    }
 
    return out;
}

References generate_quad(), and MayaFlux::Kinesis::QuadGeometry::layout.

Referenced by MayaFlux::Buffers::TextureBuffer::generate_default_quad(), MayaFlux::Buffers::NodeTextureBuffer::generate_fullscreen_quad(), generate_quad(), and MayaFlux::Buffers::TextureBuffer::generate_quad_with_transform().

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