Example usage for android.opengl GLES20 glDrawArrays

Introduction

In this page you can find the example usage for android.opengl GLES20 glDrawArrays.

Prototype

public static native void glDrawArrays(int mode, int first, int count);

Source Link

Usage

From source file:com.google.vrtoolkit.cardboard.samples.treasurehunt.MainActivity.java

/**
 * Draw the floor.//w w w.  jav a  2 s .c  om
 *
 * <p>This feeds in data for the floor into the shader. Note that this doesn't feed in data about
 * position of the light, so if we rewrite our code to draw the floor first, the lighting might
 * look strange.
 */
public void drawFloor() {
    GLES20.glUseProgram(floorProgram);

    // Set ModelView, MVP, position, normals, and color.
    GLES20.glUniform3fv(floorLightPosParam, 1, lightPosInEyeSpace, 0);
    GLES20.glUniformMatrix4fv(floorModelParam, 1, false, modelFloor, 0);
    GLES20.glUniformMatrix4fv(floorModelViewParam, 1, false, modelView, 0);
    GLES20.glUniformMatrix4fv(floorModelViewProjectionParam, 1, false, modelViewProjection, 0);
    GLES20.glVertexAttribPointer(floorPositionParam, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false, 0,
            floorVertices);
    GLES20.glVertexAttribPointer(floorNormalParam, 3, GLES20.GL_FLOAT, false, 0, floorNormals);
    GLES20.glVertexAttribPointer(floorColorParam, 4, GLES20.GL_FLOAT, false, 0, floorColors);

    GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, 6);

    checkGLError("drawing floor");
}

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