add homography to textures

[barelief]

No description provided.

[barelief]

check this one http://keystonep5.sourceforge.net/

[barelief]

check thi method from CornerPinSurface.java:

    public void render(PGraphics g, PImage texture, int tX, int tY, int tW,
            int tH) {
        g.pushMatrix();
        g.translate(x, y);
        if (Keystone.calibrate)
            g.stroke(gridColor);
        else
            g.noStroke();
        g.fill(255);
        g.beginShape(PApplet.QUADS);
        g.texture(texture);
        float u, v = 0;
        for (int x = 0; x < res - 1; x++) {
            for (int y = 0; y < res - 1; y++) {
                MeshPoint mp;
                mp = mesh[(x) + (y) * res];
                u = PApplet.map(mp.u, 0, w, tX, tX + tW);
                v = PApplet.map(mp.v, 0, h, tY, tY + tH);
                g.vertex(mp.x, mp.y, u, v);
                mp = mesh[(x + 1) + (y) * res];
                u = PApplet.map(mp.u, 0, w, tX, tX + tW);
                v = PApplet.map(mp.v, 0, h, tY, tY + tH);
                g.vertex(mp.x, mp.y, u, v);
                mp = mesh[(x + 1) + (y + 1) * res];
                u = PApplet.map(mp.u, 0, w, tX, tX + tW);
                v = PApplet.map(mp.v, 0, h, tY, tY + tH);
                g.vertex(mp.x, mp.y, u, v);
                mp = mesh[(x) + (y + 1) * res];
                u = PApplet.map(mp.u, 0, w, tX, tX + tW);
                v = PApplet.map(mp.v, 0, h, tY, tY + tH);
                g.vertex(mp.x, mp.y, u, v);
            }
        }
        g.endShape(PApplet.CLOSE);

        if (Keystone.calibrate)
            renderControlPoints(g);

        g.popMatrix();
    }

[barelief]

    /**
     * 
     * setup of interpolation grid points
     */
    private void setInterpolatedgrid() {
        A = new PVector(0, 0);
        B = new PVector(0, 0);
        C = new PVector(0, 0);
        D = new PVector(0, 0);
        A_ = new PVector(0, 0);
        C_ = new PVector(0, 0);
        O = new PVector(0, 0); // final point
    }

    /**
     * grid interpolation: map corner points before warping matrix points
     * 
     */
    public void interpolateGrid() {
        float n = gridRes + 0.0f;
        for (int i = 0; i <= n; i++) {
            for (int j = 0; j <= n; j++) {
                A_.x = PApplet.lerp(A.x, B.x, i / n);
                A_.y = PApplet.lerp(A.y, B.y, i / n);
                // ellipse(A_.x, A_.y, 10, 10);

                C_.x = PApplet.lerp(C.x, D.x, i / n);
                C_.y = PApplet.lerp(C.y, D.y, i / n);

                O.x = PApplet.lerp(A_.x, C_.x, j / n);
                O.y = PApplet.lerp(A_.y, C_.y, j / n);

                coords[i][j] = new PVector(O.x, O.y);

            }
        }
    }

[barelief]

public void render(PImage img) {
        myParent.noStroke();
        for (int i = 0; i < gridRes; i++) {
            for (int j = 0; j < gridRes; j++) {
                if (spritesON == 1)
                    myParent.stroke(50, 255, 0);
                if (giON == true)
                    myParent.stroke(150);
                myParent.beginShape();
                myParent.texture(img);
                myParent.vertex(coords[i][j].x, coords[i][j].y,
                        ((float) i / gridRes) * img.width,
                        ((float) j / gridRes) * img.height);
                myParent.vertex(coords[i + 1][j].x, coords[i + 1][j].y,
                        (((float) i + 1) / gridRes) * img.width,
                        ((float) j / gridRes) * img.height);
                myParent.vertex(coords[i + 1][j + 1].x, coords[i + 1][j + 1].y,
                        (((float) i + 1) / gridRes) * img.width,
                        (((float) j + 1) / gridRes) * img.height);
                myParent.vertex(coords[i][j + 1].x, coords[i][j + 1].y,
                        ((float) i / gridRes) * img.width,
                        (((float) j + 1) / gridRes) * img.height);

                myParent.endShape();
                // myParent.fill(255);
                // myParent.ellipse(coords[i][j].x, coords[i][j].y, 100, 100);
            }
        }
        sprites();
    }