Graphic lines by Yvo Jacquier

signature of the painter
« Nocturne » : the relationships of jazz musicians by a composition with the triangle 3-4-5.
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« Nocturne » - composition

The composition of this nocturne is very didactic
Composition 1 The triangle 3-4-5
The trumpet player gives the grid by his height 3 and width 2. The triangle 3-4-5 gathers the three musicians' heads. The duo sax-trumpet is in the circle 2. The bisectors are speaking : the diagonal of a simple square (in blue) crosses the head of the trumpet. The diagonal of double square (yellow) comes from the head of an african sculpture and it holds the hand of the saxophonist. The diagonal of the triple square crosses vertically his body and it comes up to the beak of the celtic bird. The side 3 unifies the two imaginary symbols, african and celtic. The side 5 is the link between Africa, the double bass, the mouth of the trumpet and the standing foot of the sax - he crosses the side 4 with his other, which keeps the tempo/equilibrium.
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« Nocturne » : second part of the composition.

Composition 2 The golden rectangle
Every triangle 3-4-5 has a natural golden rectangle, shown here in yellow. Its internal lines fit with the drawing, and once more the mouth of the trumpet player is concerned. Generally, the bisectors (blue) show the contact (/separation) while the diagonals talk about action (/interaction).
Composition 3 Circles diameter 2
The first circle builds a rose by a vesica piscis, then a cross. For those who need to be reassured, the circles are often very convincing. Two other options are shown here, about the trumpet, and the upper center is on a bisector at 45° coming from the middle of the hypotenuse.
Composition 4 Circles diameter 5 and 9/2
Here is the natural circumcircle of the triangle. A second circle diameter 9/2 choses the same center. The heart of the man. At its intersection with the previous bisector (blue), we center a second circle diameter 5 for the frieze.
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This blue is not the same like in the classical nocturnes of Yvo Jacquier. For his early landscapes, he used prussian blue, but for this depiction of a jazz group the painter chose the « monestial » color, which is lighter and brighter. For this contemporary painting, the artist mixed different points of view about the personages : he managed the transition between high and low angle shots.