diff options
Diffstat (limited to 'chromium/third_party/angle/samples/gles2_book/Common/esTransform.c')
-rw-r--r-- | chromium/third_party/angle/samples/gles2_book/Common/esTransform.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/chromium/third_party/angle/samples/gles2_book/Common/esTransform.c b/chromium/third_party/angle/samples/gles2_book/Common/esTransform.c deleted file mode 100644 index 7da8f7652c0..00000000000 --- a/chromium/third_party/angle/samples/gles2_book/Common/esTransform.c +++ /dev/null @@ -1,212 +0,0 @@ -// -// Book: OpenGL(R) ES 2.0 Programming Guide -// Authors: Aaftab Munshi, Dan Ginsburg, Dave Shreiner -// ISBN-10: 0321502795 -// ISBN-13: 9780321502797 -// Publisher: Addison-Wesley Professional -// URLs: http://safari.informit.com/9780321563835 -// http://www.opengles-book.com -// - -// ESUtil.c -// -// A utility library for OpenGL ES. This library provides a -// basic common framework for the example applications in the -// OpenGL ES 2.0 Programming Guide. -// - -/// -// Includes -// -#include "esUtil.h" -#include <math.h> - -#define PI 3.1415926535897932384626433832795f - -void ESUTIL_API -esScale(ESMatrix *result, GLfloat sx, GLfloat sy, GLfloat sz) -{ - result->m[0][0] *= sx; - result->m[0][1] *= sx; - result->m[0][2] *= sx; - result->m[0][3] *= sx; - - result->m[1][0] *= sy; - result->m[1][1] *= sy; - result->m[1][2] *= sy; - result->m[1][3] *= sy; - - result->m[2][0] *= sz; - result->m[2][1] *= sz; - result->m[2][2] *= sz; - result->m[2][3] *= sz; -} - -void ESUTIL_API -esTranslate(ESMatrix *result, GLfloat tx, GLfloat ty, GLfloat tz) -{ - result->m[3][0] += (result->m[0][0] * tx + result->m[1][0] * ty + result->m[2][0] * tz); - result->m[3][1] += (result->m[0][1] * tx + result->m[1][1] * ty + result->m[2][1] * tz); - result->m[3][2] += (result->m[0][2] * tx + result->m[1][2] * ty + result->m[2][2] * tz); - result->m[3][3] += (result->m[0][3] * tx + result->m[1][3] * ty + result->m[2][3] * tz); -} - -void ESUTIL_API -esRotate(ESMatrix *result, GLfloat angle, GLfloat x, GLfloat y, GLfloat z) -{ - GLfloat sinAngle, cosAngle; - GLfloat mag = sqrtf(x * x + y * y + z * z); - - sinAngle = sinf ( angle * PI / 180.0f ); - cosAngle = cosf ( angle * PI / 180.0f ); - if ( mag > 0.0f ) - { - GLfloat xx, yy, zz, xy, yz, zx, xs, ys, zs; - GLfloat oneMinusCos; - ESMatrix rotMat; - - x /= mag; - y /= mag; - z /= mag; - - xx = x * x; - yy = y * y; - zz = z * z; - xy = x * y; - yz = y * z; - zx = z * x; - xs = x * sinAngle; - ys = y * sinAngle; - zs = z * sinAngle; - oneMinusCos = 1.0f - cosAngle; - - rotMat.m[0][0] = (oneMinusCos * xx) + cosAngle; - rotMat.m[0][1] = (oneMinusCos * xy) - zs; - rotMat.m[0][2] = (oneMinusCos * zx) + ys; - rotMat.m[0][3] = 0.0F; - - rotMat.m[1][0] = (oneMinusCos * xy) + zs; - rotMat.m[1][1] = (oneMinusCos * yy) + cosAngle; - rotMat.m[1][2] = (oneMinusCos * yz) - xs; - rotMat.m[1][3] = 0.0F; - - rotMat.m[2][0] = (oneMinusCos * zx) - ys; - rotMat.m[2][1] = (oneMinusCos * yz) + xs; - rotMat.m[2][2] = (oneMinusCos * zz) + cosAngle; - rotMat.m[2][3] = 0.0F; - - rotMat.m[3][0] = 0.0F; - rotMat.m[3][1] = 0.0F; - rotMat.m[3][2] = 0.0F; - rotMat.m[3][3] = 1.0F; - - esMatrixMultiply( result, &rotMat, result ); - } -} - -void ESUTIL_API -esFrustum(ESMatrix *result, float left, float right, float bottom, float top, float nearZ, float farZ) -{ - float deltaX = right - left; - float deltaY = top - bottom; - float deltaZ = farZ - nearZ; - ESMatrix frust; - - if ( (nearZ <= 0.0f) || (farZ <= 0.0f) || - (deltaX <= 0.0f) || (deltaY <= 0.0f) || (deltaZ <= 0.0f) ) - return; - - frust.m[0][0] = 2.0f * nearZ / deltaX; - frust.m[0][1] = frust.m[0][2] = frust.m[0][3] = 0.0f; - - frust.m[1][1] = 2.0f * nearZ / deltaY; - frust.m[1][0] = frust.m[1][2] = frust.m[1][3] = 0.0f; - - frust.m[2][0] = (right + left) / deltaX; - frust.m[2][1] = (top + bottom) / deltaY; - frust.m[2][2] = -(nearZ + farZ) / deltaZ; - frust.m[2][3] = -1.0f; - - frust.m[3][2] = -2.0f * nearZ * farZ / deltaZ; - frust.m[3][0] = frust.m[3][1] = frust.m[3][3] = 0.0f; - - esMatrixMultiply(result, &frust, result); -} - - -void ESUTIL_API -esPerspective(ESMatrix *result, float fovy, float aspect, float nearZ, float farZ) -{ - GLfloat frustumW, frustumH; - - frustumH = tanf( fovy / 360.0f * PI ) * nearZ; - frustumW = frustumH * aspect; - - esFrustum( result, -frustumW, frustumW, -frustumH, frustumH, nearZ, farZ ); -} - -void ESUTIL_API -esOrtho(ESMatrix *result, float left, float right, float bottom, float top, float nearZ, float farZ) -{ - float deltaX = right - left; - float deltaY = top - bottom; - float deltaZ = farZ - nearZ; - ESMatrix ortho; - - if ( (deltaX == 0.0f) || (deltaY == 0.0f) || (deltaZ == 0.0f) ) - return; - - esMatrixLoadIdentity(&ortho); - ortho.m[0][0] = 2.0f / deltaX; - ortho.m[3][0] = -(right + left) / deltaX; - ortho.m[1][1] = 2.0f / deltaY; - ortho.m[3][1] = -(top + bottom) / deltaY; - ortho.m[2][2] = -2.0f / deltaZ; - ortho.m[3][2] = -(nearZ + farZ) / deltaZ; - - esMatrixMultiply(result, &ortho, result); -} - - -void ESUTIL_API -esMatrixMultiply(ESMatrix *result, ESMatrix *srcA, ESMatrix *srcB) -{ - ESMatrix tmp = { 0.0f }; - int i; - - for (i=0; i<4; i++) - { - tmp.m[i][0] = (srcA->m[i][0] * srcB->m[0][0]) + - (srcA->m[i][1] * srcB->m[1][0]) + - (srcA->m[i][2] * srcB->m[2][0]) + - (srcA->m[i][3] * srcB->m[3][0]) ; - - tmp.m[i][1] = (srcA->m[i][0] * srcB->m[0][1]) + - (srcA->m[i][1] * srcB->m[1][1]) + - (srcA->m[i][2] * srcB->m[2][1]) + - (srcA->m[i][3] * srcB->m[3][1]) ; - - tmp.m[i][2] = (srcA->m[i][0] * srcB->m[0][2]) + - (srcA->m[i][1] * srcB->m[1][2]) + - (srcA->m[i][2] * srcB->m[2][2]) + - (srcA->m[i][3] * srcB->m[3][2]) ; - - tmp.m[i][3] = (srcA->m[i][0] * srcB->m[0][3]) + - (srcA->m[i][1] * srcB->m[1][3]) + - (srcA->m[i][2] * srcB->m[2][3]) + - (srcA->m[i][3] * srcB->m[3][3]) ; - } - memcpy(result, &tmp, sizeof(ESMatrix)); -} - - -void ESUTIL_API -esMatrixLoadIdentity(ESMatrix *result) -{ - memset(result, 0x0, sizeof(ESMatrix)); - result->m[0][0] = 1.0f; - result->m[1][1] = 1.0f; - result->m[2][2] = 1.0f; - result->m[3][3] = 1.0f; -} - |