Example usage for org.lwjgl.opengl GL11 glBegin

Introduction

In this page you can find the example usage for org.lwjgl.opengl GL11 glBegin.

Prototype

public static native void glBegin(@NativeType("GLenum") int mode);

Source Link

Document

Begins the definition of vertex attributes of a sequence of primitives to be transferred to the GL.

Usage

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

/**
 * Horizontal line/*from   www  .  j  a va2  s  .  com*/
 * 
 * @param x
 * @param x2
 * @param y
 * @param l1
 * @param col1
 */
public static void drawHorizontalLine(int x, int x2, int y, float l1, int col1) {
    float f = ((col1 >> 24) & 0xFF) / 255F;
    float f1 = ((col1 >> 16) & 0xFF) / 255F;
    float f2 = ((col1 >> 8) & 0xFF) / 255F;
    float f3 = (col1 & 0xFF) / 255F;

    GL11.glEnable(GL11.GL_BLEND);
    GL11.glDisable(GL11.GL_TEXTURE_2D);
    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    GL11.glEnable(GL11.GL_LINE_SMOOTH);

    GL11.glPushMatrix();
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glLineWidth(l1);
    GL11.glBegin(GL11.GL_LINES);
    GL11.glVertex2d(x, y);
    GL11.glVertex2d(x2, y);
    GL11.glEnd();
    GL11.glPopMatrix();

    GL11.glEnable(GL11.GL_TEXTURE_2D);
    GL11.glDisable(GL11.GL_BLEND);
    GL11.glDisable(GL11.GL_LINE_SMOOTH);
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

/**
 * Diagonal line?//  w ww  .  j a v a 2  s.c  om
 * 
 * @param x
 * @param x2
 * @param y
 * @param l1
 * @param col1
 */
public static void drawDiagonalLine(int x, int x2, int y, float l1, int col1) {
    float f = ((col1 >> 24) & 0xFF) / 255F;
    float f1 = ((col1 >> 16) & 0xFF) / 255F;
    float f2 = ((col1 >> 8) & 0xFF) / 255F;
    float f3 = (col1 & 0xFF) / 255F;

    GL11.glEnable(GL11.GL_BLEND);
    GL11.glDisable(GL11.GL_TEXTURE_2D);
    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    GL11.glEnable(GL11.GL_LINE_SMOOTH);

    GL11.glPushMatrix();
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glLineWidth(l1);
    GL11.glBegin(GL11.GL_LINES);
    GL11.glVertex2d(x, y);
    GL11.glVertex2d(y, x2);
    GL11.glEnd();
    GL11.glPopMatrix();

    GL11.glEnable(GL11.GL_TEXTURE_2D);
    GL11.glDisable(GL11.GL_BLEND);
    GL11.glDisable(GL11.GL_LINE_SMOOTH);
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

/**
 * Border of a circle/*from ww w . j a  v a 2s  .c o m*/
 * 
 * @param x
 * @param y
 * @param r
 * @param c
 */
public static void drawCircle(int x, int y, double r, int c) {
    float f = ((c >> 24) & 0xff) / 255F;
    float f1 = ((c >> 16) & 0xff) / 255F;
    float f2 = ((c >> 8) & 0xff) / 255F;
    float f3 = (c & 0xff) / 255F;
    GL11.glEnable(3042 /* GL_BLEND */);
    GL11.glDisable(3553 /* GL_TEXTURE_2D */);
    GL11.glEnable(2848 /* GL_LINE_SMOOTH */);
    GL11.glBlendFunc(770, 771);
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glBegin(2 /* GL_LINE_LOOP */);
    for (int i = 0; i <= 360; i++) {
        double x2 = Math.sin(((i * 3.141526D) / 180)) * r;
        double y2 = Math.cos(((i * 3.141526D) / 180)) * r;
        GL11.glVertex2d(x + x2, y + y2);
    }
    GL11.glEnd();
    GL11.glDisable(2848 /* GL_LINE_SMOOTH */);
    GL11.glEnable(3553 /* GL_TEXTURE_2D */);
    GL11.glDisable(3042 /* GL_BLEND */);
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

/**
 * Circle/*w w w . j  a v  a2 s.com*/
 * 
 * @param x
 * @param y
 * @param r
 * @param c
 */
public static void drawFilledCircle(int x, int y, double r, int c) {
    float f = ((c >> 24) & 0xff) / 255F;
    float f1 = ((c >> 16) & 0xff) / 255F;
    float f2 = ((c >> 8) & 0xff) / 255F;
    float f3 = (c & 0xff) / 255F;
    GL11.glEnable(3042 /* GL_BLEND */);
    GL11.glDisable(3553 /* GL_TEXTURE_2D */);
    GL11.glEnable(2848 /* GL_LINE_SMOOTH */);
    GL11.glBlendFunc(770, 771);
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glBegin(6 /* GL_TRIANGLE_FAN */);
    for (int i = 0; i <= 360; i++) {
        double x2 = Math.sin(((i * 3.141526D) / 180)) * r;
        double y2 = Math.cos(((i * 3.141526D) / 180)) * r;
        GL11.glVertex2d(x + x2, y + y2);
    }
    GL11.glEnd();
    GL11.glDisable(2848 /* GL_LINE_SMOOTH */);
    GL11.glEnable(3553 /* GL_TEXTURE_2D */);
    GL11.glDisable(3042 /* GL_BLEND */);
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

/**
 * Triangle/*from  w w w . j  a  v a  2s.  co  m*/
 * 
 * @param cx
 * @param cy
 * @param c
 */
public static void drawTri(int cx, int cy, int c) {
    GL11.glRotatef(180, 0F, 0F, 1.0F);
    float f = ((c >> 24) & 0xff) / 255F;
    float f1 = ((c >> 16) & 0xff) / 255F;
    float f2 = ((c >> 8) & 0xff) / 255F;
    float f3 = (c & 0xff) / 255F;
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glEnable(3042);
    GL11.glDisable(3553);
    GL11.glEnable(GL11.GL_LINE_SMOOTH);
    GL11.glBlendFunc(770, 771);
    GL11.glBegin(GL11.GL_TRIANGLES);
    GL11.glRotatef(180, 0F, 0F, 1.0F);
    GL11.glVertex2d(cx, cy + 2);
    GL11.glVertex2d(cx + 2, cy - 2);
    GL11.glVertex2d(cx - 2, cy - 2);

    GL11.glEnd();
    GL11.glDisable(GL11.GL_LINE_SMOOTH);
    GL11.glEnable(3553);
    GL11.glDisable(3042);
    GL11.glRotatef(-180, 0F, 0F, 1.0F);
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

/**
 * Triangle. Used for radars//from ww w  .ja v  a  2s.co  m
 * 
 * @param e
 * @param cx
 * @param cy
 * @param c
 */
public static void drawTriangle(Entity e, double cx, double cy, int c) {
    GL11.glPushMatrix();
    GL11.glScaled(0.5, 0.5, 0.5);
    GL11.glTranslated(cx, cy, 0);
    if (e instanceof EntityClientPlayerMP) {
        GL11.glRotatef(e.rotationYaw, 0F, 0F, 1.0F);
    } else {
        GL11.glRotatef(-e.rotationYaw, 0F, 0F, 1.0F);
    }
    float f = ((c >> 24) & 0xff) / 255F;
    float f1 = ((c >> 16) & 0xff) / 255F;
    float f2 = ((c >> 8) & 0xff) / 255F;
    float f3 = (c & 0xff) / 255F;
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glEnable(3042);
    GL11.glDisable(3553);
    GL11.glEnable(GL11.GL_LINE_SMOOTH);
    GL11.glBlendFunc(770, 771);
    GL11.glBegin(GL11.GL_TRIANGLES);

    GL11.glVertex2d(0, 0 + 6);
    GL11.glVertex2d(0 + 3, 0 - 2);
    GL11.glVertex2d(0 - 3, 0 - 2);

    GL11.glEnd();
    GL11.glDisable(GL11.GL_LINE_SMOOTH);
    GL11.glEnable(3553);
    GL11.glDisable(3042);
    GL11.glRotatef(e.rotationYaw, 0F, 0F, 1.0F);

    GL11.glPopMatrix();
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

/**
 * Half Circle//from w  w w  . j a v  a2  s  .c  o m
 * 
 * Modes: 0 Left to right, bottom to top 1 Top to bottom, left to right 2
 * Right to left, top to bottom 3 Bottom to top, right to left
 * 
 * @param x
 * @param y
 * @param r
 * @param c
 */
public static void drawFilledHalfCircle(int x, int y, double r, int c, int mode) {
    float f = ((c >> 24) & 0xff) / 255F;
    float f1 = ((c >> 16) & 0xff) / 255F;
    float f2 = ((c >> 8) & 0xff) / 255F;
    float f3 = (c & 0xff) / 255F;
    GL11.glDisable(3553 /* GL_TEXTURE_2D */);
    GL11.glEnable(GL11.GL_BLEND);
    GL11.glBlendFunc(770, 771);

    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

    GL11.glEnable(GL11.GL_LINE_SMOOTH);
    GL11.glEnable(GL11.GL_POLYGON_SMOOTH);
    GL11.glEnable(GL11.GL_POINT_SMOOTH);
    GL11.glHint(GL11.GL_LINE_SMOOTH_HINT, GL11.GL_NICEST);
    GL11.glHint(GL11.GL_POLYGON_SMOOTH_HINT, GL11.GL_NICEST);
    GL11.glHint(GL11.GL_POLYGON_SMOOTH_HINT, GL11.GL_NICEST);

    GL11.glColor4f(f1, f2, f3, f);
    GL11.glBegin(6 /* GL_TRIANGLE_FAN */);

    int startang = 0;
    int endang = 0;

    if (mode == 0) {
        startang = 90;
        endang = 270;
    }
    if (mode == 1) {
        startang = 360;
        endang = 540;
    }
    if (mode == 2) {
        startang = 270;
        endang = 450;
    }
    if (mode == 3) {
        startang = 180;
        endang = 360;
    }

    for (int i = startang; i <= endang; i++) {
        double x2 = Math.sin(((i * 3.141526D) / 180)) * r;
        double y2 = Math.cos(((i * 3.141526D) / 180)) * r;
        GL11.glVertex2d(x + x2, y + y2);
    }
    GL11.glEnd();
    GL11.glDisable(GL11.GL_POLYGON_SMOOTH);
    GL11.glDisable(GL11.GL_POINT_SMOOTH);
    GL11.glDisable(2848 /* GL_LINE_SMOOTH */);
    GL11.glEnable(3553 /* GL_TEXTURE_2D */);
    GL11.glDisable(3042 /* GL_BLEND */);
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

public static void drawGradientRect(double x, double y, double x2, double y2, int col1, int col2) {
    float f = ((col1 >> 24) & 0xFF) / 255F;
    float f1 = ((col1 >> 16) & 0xFF) / 255F;
    float f2 = ((col1 >> 8) & 0xFF) / 255F;
    float f3 = (col1 & 0xFF) / 255F;

    float f4 = ((col2 >> 24) & 0xFF) / 255F;
    float f5 = ((col2 >> 16) & 0xFF) / 255F;
    float f6 = ((col2 >> 8) & 0xFF) / 255F;
    float f7 = (col2 & 0xFF) / 255F;

    GL11.glEnable(GL11.GL_BLEND);/*from w  w w  .  j  a v  a  2 s.  com*/
    GL11.glDisable(GL11.GL_TEXTURE_2D);
    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    GL11.glEnable(GL11.GL_LINE_SMOOTH);
    GL11.glShadeModel(GL11.GL_SMOOTH);

    GL11.glPushMatrix();
    GL11.glBegin(GL11.GL_QUADS);
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glVertex2d(x2, y);
    GL11.glVertex2d(x, y);

    GL11.glColor4f(f5, f6, f7, f4);
    GL11.glVertex2d(x, y2);
    GL11.glVertex2d(x2, y2);
    GL11.glEnd();
    GL11.glPopMatrix();

    GL11.glEnable(GL11.GL_TEXTURE_2D);
    GL11.glDisable(GL11.GL_BLEND);
    GL11.glDisable(GL11.GL_LINE_SMOOTH);
    GL11.glShadeModel(GL11.GL_FLAT);
}

---

From source file:com.kodehawa.gui.api.render.ModGuiUtils.java

License:Open Source License

public static void drawGBRect(double x, double y, double x2, double y2, float l1, int col1, int col2,
        int col3) {
    float f = ((col1 >> 24) & 0xFF) / 255F;
    float f1 = ((col1 >> 16) & 0xFF) / 255F;
    float f2 = ((col1 >> 8) & 0xFF) / 255F;
    float f3 = (col1 & 0xFF) / 255F;

    GL11.glDisable(GL11.GL_TEXTURE_2D);/*from   www .jav  a2 s.  c om*/
    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    GL11.glEnable(GL11.GL_LINE_SMOOTH);
    GL11.glDisable(GL11.GL_BLEND);

    GL11.glPushMatrix();
    GL11.glColor4f(f1, f2, f3, f);
    GL11.glLineWidth(1F);
    GL11.glBegin(GL11.GL_LINES);
    GL11.glVertex2d(x, y);
    GL11.glVertex2d(x, y2);
    GL11.glVertex2d(x2, y2);
    GL11.glVertex2d(x2, y);
    GL11.glVertex2d(x, y);
    GL11.glVertex2d(x2, y);
    GL11.glVertex2d(x, y2);
    GL11.glVertex2d(x2, y2);
    GL11.glEnd();
    GL11.glPopMatrix();

    drawGradientRect(x, y, x2, y2, col2, col3);

    GL11.glEnable(GL11.GL_BLEND);
    GL11.glEnable(GL11.GL_TEXTURE_2D);
    GL11.glDisable(GL11.GL_LINE_SMOOTH);
}

---

From source file:com.lion328.thaifixes.nmod.ThaiFixesFontRenderer.java

License:Open Source License

private float renderThaiChar(char c, boolean italic) {
    try {/*w  ww.j  a  v  a 2s .co  m*/
        float cPosX, cPosY;
        switch (ThaiFixesConfiguration.getFontStyle()) {
        default:
        case UNICODE:
            if (ThaiFixesUtils.isSpecialThaiChar(c)) {
                //posX.setFloat(this, posX.getFloat(this) - 4); // move character to before character position
                byte size = ((byte[]) glyphWidth.get(this))[c];
                if (size == 0)
                    return 0.0F;
                else {
                    invokeMethod("loadGlyphTexture", new Class[] { int.class }, (int) (c / 256)); // load texture

                    float charHeightOnTexture = 4.98F,
                            beginTexcoordY = ThaiFixesUtils.isLowerThaiChar(c) ? 15.98F - charHeightOnTexture
                                    : 0F,
                            quadHeight = charHeightOnTexture / 2; // vertex position, not for texture coordinate.

                    // glyphWidth format:
                    // XXXXYYYY, XXXX as start X position on texture coordinate and YYYY as width.
                    float startTexcoordX = (float) (size >>> 4);
                    float charWidth = (float) ((size & 0xF) + 1);

                    float texcoordX = (float) (c % 16 * 16) + startTexcoordX;
                    float texcoordY = (float) ((c & 255) / 16 * 16);
                    float realCharWidth = charWidth - startTexcoordX - 0.02F;
                    float italicSize = italic ? 1.0F : 0.0F;

                    cPosX = posX.getFloat(this) - (realCharWidth + 0.02F) / 2 - 1; // get current position
                    cPosY = posY.getFloat(this);

                    GL11.glBegin(GL11.GL_TRIANGLE_STRIP);
                    GL11.glTexCoord2f(texcoordX / 256.0F, (texcoordY + beginTexcoordY) / 256.0F);
                    GL11.glVertex2f(cPosX + italicSize, cPosY + (beginTexcoordY / 2));
                    GL11.glTexCoord2f(texcoordX / 256.0F,
                            (texcoordY + beginTexcoordY + charHeightOnTexture) / 256.0F);
                    GL11.glVertex2f(cPosX - italicSize, cPosY + (beginTexcoordY / 2) + quadHeight);
                    GL11.glTexCoord2f((texcoordX + realCharWidth) / 256.0F,
                            (texcoordY + beginTexcoordY) / 256.0F);
                    GL11.glVertex2f(cPosX + realCharWidth / 2.0F + italicSize, cPosY + (beginTexcoordY / 2));
                    GL11.glTexCoord2f((texcoordX + realCharWidth) / 256.0F,
                            (texcoordY + beginTexcoordY + charHeightOnTexture) / 256.0F);
                    GL11.glVertex2f(cPosX + realCharWidth / 2.0F - italicSize,
                            cPosY + (beginTexcoordY / 2) + quadHeight);
                    GL11.glEnd();
                    return 0;//(realCharWidth + 0.02F) / 2.0F + 1.0F;
                }
            }
        case DISABLE:
            return (Float) invokeMethod("renderUnicodeChar", new Class[] { char.class, boolean.class }, c,
                    italic);
        case MCPX:
            //if(ThaiFixesUtils.isSpecialThaiChar(c)) posX.setFloat(this, posX.getFloat(this) - 5.0F);
            int posOnArray = c - THAI_CHAR_START;

            cPosX = posX.getFloat(this)
                    - (ThaiFixesUtils.isSpecialThaiChar(c) ? thaiCharWidth[posOnArray] : 0F); // get current position
            cPosY = posY.getFloat(this)
                    + (ThaiFixesUtils
                            .isSpecialThaiChar(c)
                                    ? (ThaiFixesUtils.isUpperThaiChar(c) ? -7.0F : 2.0F)
                                            - (!ThaiFixesUtils.isSpecialSpecialThaiChar(beforeChar)
                                                    ? (ThaiFixesUtils
                                                            .isSpecialThaiChar(beforeChar)
                                                                    ? 2.0F
                                                                    : (ThaiFixesUtils.isVeryLongTailThaiChar(
                                                                            beforeChar) ? 1.0F : 0.0F))
                                                    : 0.0F)
                                    : 0.0F);

            float texcoordX = (float) (posOnArray % 16 * 8);
            float texcoordY = (float) (posOnArray / 16 * 8);
            float italicSize = italic ? 1.0F : 0.0F;
            renderEngine.bindTexture(mcpx_font);
            float f3 = (float) thaiCharWidth[posOnArray] - 0.01F;
            GL11.glBegin(GL11.GL_TRIANGLE_STRIP);
            GL11.glTexCoord2f(texcoordX / 128.0F, texcoordY / 128.0F);
            GL11.glVertex2f(cPosX + italicSize, cPosY);
            GL11.glTexCoord2f(texcoordX / 128.0F, (texcoordY + 7.99F) / 128.0F);
            GL11.glVertex2f(cPosX - italicSize, cPosY + 7.99F);
            GL11.glTexCoord2f((texcoordX + f3 - 1.0F) / 128.0F, texcoordY / 128.0F);
            GL11.glVertex2f(cPosX + f3 - 1.0F + italicSize, cPosY);
            GL11.glTexCoord2f((texcoordX + f3 - 1.0F) / 128.0F, (texcoordY + 7.99F) / 128.0F);
            GL11.glVertex2f(cPosX + f3 - 1.0F - italicSize, cPosY + 7.99F);
            GL11.glEnd();
            return ThaiFixesUtils.isSpecialThaiChar(c) ? 0 : (float) thaiCharWidth[posOnArray];
        }
    } catch (Exception e) {
        System.out.println("[ThaiFixes] Error during render an thai character '" + c + "'"
                + (italic ? " with italic style" : "") + ".");
        e.printStackTrace();
    }
    return 0.0F;
}

---

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